Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fac4c2e1b895e43…

MALICIOUS

PDF

95.9 KB Created: 2021-08-26 01:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3a6f1c93ba079785884b72c80fb4db1 SHA-1: aa83f37b88b3f70238e9a854887d4e99af054a63 SHA-256: 5fac4c2e1b895e4305d8981915818342a3299bb6df5c78ece5cd565175b997fe
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, as indicated by the PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the presence of many external links points to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ccskin.com/geektic/files/86804170158.pdf In PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829811bfac9---47290877123.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/913cf22832524f327b95b20efe68ec78/zerigafi.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210601054835.pdfIn PDF document text
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/51447463822.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/rewukunugemikojuwi.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a63e7746e25---gulofima.pdfPDF link annotation
    • http://sushiosushi.com/uploads/files/narumefik.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/cdc847ccf13cebfcdf8fc0dbb94192fc/nukajifob.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866253a22dc---sulitiwajubekisibiwipofi.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/babozedakivelalivej.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c284fadeb429a79e1201f9df08e9c18b/65450707755.pdfIn PDF document text
    • https://ever-progress.com/upload/files/lozetonatoxuxetug.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210708031519.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fef4d17c9---ruromibipepu.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/11qphmd7dfst64asspl91h6jh6/51271188487.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/vfkv89heu086v478ugdp5vbsl4/43120871302.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/4hsq4idhrt3d47kfd6n0vvuoki/rafopo.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44f58b224---roraluzajipexujepebaje.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/jokapemorajubumod.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/89630694112.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/a7c02b3e554066e5133971ef8e341861/22455391110.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/0p0g1hhqasf6ct4jqus2013h5i/naligumulu.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210622200011_ca5y6c.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/fibebuxelogonaz.pdfIn PDF document text
    • https://noddy.nu/images/file/zatovobotebarobunimenik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=redox+reaction+chapter+notesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_01_sfnt_off000113fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FC 17056 bytes
SHA-256: 4206f0523579a0d89cd615c964eefd2ff52f54948dd259678cb740ae5b8746a8
font_02_sfnt_off000140d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D4 10712 bytes
SHA-256: db45f93f9a6f91c3a2785f77c1cc76b65d92e71a093cc2814275a9f4183b87fe
font_03_sfnt_off0001595b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1595B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.