Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf3d683c335904f…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 19:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fd62d44446631fde841cb94701b15a95 SHA-1: 7148dfdbcaaa65222c5cbfcafb422b1decee0a68 SHA-256: acf3d683c335904f1c0dcac96179a10b1e4945c26677518904b07f1d903c70c0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It leverages SEO poisoning and links to compromised CMS uploads to trick users into downloading further malicious content. The embedded URLs point to potentially malicious PDF files hosted on various domains, suggesting a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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 http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729627a033a---11335687177.pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fae3c69f4---xanoka.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f72e2601cf1---5898895511.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b3619f56a---lemeraparu.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/25257435129.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078e71db75e8---zojimudojowuras.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/visajezavub.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/67905431272.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/vugenexuzar.pdfIn PDF document text
    • http://gtshotel.it/images/file/93464731677.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986fc46ea14---41977450586.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0hjk345qnv4s8sqokbshopd68d/44331135704.pdfIn PDF document text
    • http://portableandcool.com/files/files/63728947311.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/09181b2b6c77de6f65e0dadd388bf654/dibemujugalized.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b3c802c33018d02f79c0e76396df035c/69175086952.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/karitonalaxasujulew.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/juvamipovikenodegotulono.pdfIn PDF document text
    • http://gibisch.info/files/files/zodesipojijiloteji.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/vilimazobizij.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120ed7cc07d2---nivazijal.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/5baf70ec59b87ca8801f2e1f91966bac/87924102322.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210611163655.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/3f0fd4a09fad83c7ce42637099b1d0b3/punebofava.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/31498547035.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/7686262868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=english+olympiad+for+class+1+sample+paper+free+download+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB463 1936 bytes
SHA-256: 581ee6410b39f3fc3c0b7eee44a1f688a16d32601ddb4ff915e7da4a385d4a1a
font_01_sfnt_off0000bd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000d56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56D 18132 bytes
SHA-256: 4122482f01bd1c4a9c52f5418d65b3d19f7a13909cad04c39c19f3646931f6f5
font_03_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 11204 bytes
SHA-256: b5e68f8b860f3a957c0cca048bcbf36e51482bb20eaa18f58236f2d6e42dabdd
font_04_sfnt_off00011cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFB 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4

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