Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2f56722118f559…

MALICIOUS

PDF

100.9 KB Created: 2021-06-28 04:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9192f7eae0a7b994265e935f8fd981ca SHA-1: f7bf268feb77c6dcfab94d1bb7d4847c9a9dbbde SHA-256: 2c2f56722118f559a8341ef32d878cdf6b2732b6912aac248f67cbd2c4e5bc2f
176 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. This structure suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c1c3e95e---17595982691.pdf In PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e452fb14---fisuwisozanewulipepuwe.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/43900099257.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/32193527751.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/a1d0754f0bd96a33377a09c547c063ae/98229651289.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/5293315605.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/ff8443ff87d311ea8463be8da70636af/18578615257.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/1ine4lpmvkprmte2sns69u0bf2/43471089771.pdfIn PDF document text
    • https://zop.bg/webroot/img/content/files/vigepa.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e62343ecf4e8bb2f04780f53a479e97a/kobalavusup.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/fsn7kpuo0k03g0dmob1281tj30/bezuzezuzivifegaberitub.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/jolamokezawajovaweto.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827fb42ac04---32929847837.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/a7ae92e8fd58b4a50dba9872ea9c93af/6692956708.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160883134ac710---9252364887.pdfIn PDF document text
    • https://signika.pl/Upload/file/zikonowotiponagogo.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6b0cd77aa4f3aeaa95d2580cdbd92d05/49182196203.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c06357439---wejakixuxukulasifebi.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6960cb0542---xoroxamuxo.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b3499822cbfdd5398d7d319be8bc2578/lejimamugog.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/30127507326.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da22052b4b---76348719117.pdfPDF link annotation
    • https://clubesolbra.com/uploads/files/24699388832.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/42203163901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+seven+chakras+in+our+bodyPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14250 10800 bytes
SHA-256: 2123968fef0998de2952f6bff41e19c752504af317cf7018ba3fc999c12417d9
font_02_sfnt_off00015b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B25 16696 bytes
SHA-256: 934c061c966392ae85a53a189ca8a1022b26d481be3b305410bd7ac7066b22aa