Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dabd94d07c2575a…

MALICIOUS

PDF

88.9 KB Created: 2021-07-23 00:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 770529450a640b8dde9c8f079a5858df SHA-1: 1b2da9342e5c547f97a60201829227307dde101b SHA-256: 7dabd94d07c2575a22142468a78545606eb65e0d634be0f03b05c71849752bea
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allcreaturesinc.com/files/files/70567785431.pdf In PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160d402841e61a---vuvigof.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/lufisiderugipe.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/f5924e16cfde34062df42bbac1ff62d4/54464519623.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9aa092d4f0f6608bd916f59b54032da9/bamalixuzokukirexopukasun.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/dasudabugufawejesedof.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/bc8498851fa49f0e437a2b6a3ce3fb1b/mokubezevabezapawoveg.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/8731c58024271341a990e3cc35bc582a/jujalolasufera.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/61012349928.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/88358732041.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/341ae1b2a5bac3ad03023376d57fa93d/jezasovulute.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210616001231_985jwi.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/serapadobenulupove.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/lulovimetemul.pdfIn PDF document text
    • http://abroadster.com/files/77211487073.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a14482f2704---vevutenogidepexiwupesibe.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b15e98e160e---26291737147.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/duwapojutijolibigonomonob.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/bugoden.pdfIn PDF document text
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/jrg81oh4orga68q2qqrdjlb5t2/73660663358.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb92d1b390---desefumexamowarulibubi.pdfIn PDF document text
    • http://huiking.cn/uploads/file/240024159314.pdfIn PDF document text
    • http://mamitobe.ru/files/file/fonuboretubasezoba.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/58778356484.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e23678e6df---86077544320.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/kuguxerexaveboxijedopabax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=list+of+offenders+in+my+areaPDF 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_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 15900 bytes
SHA-256: 8c698c783d33d30202d34c4ad75efd924b9f5ee12e51d27e7b3778d4b461769e
font_01_sfnt_off00012566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12566 10540 bytes
SHA-256: 92695270ad0a74878c96574cfe4df7a02df63ddc125653559b752630678086be
font_02_sfnt_off00013d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1