Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ed700173674c63…

MALICIOUS

PDF

76.1 KB Created: 2021-08-22 02:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 089fb29a7acc0b93be0e36b21a382cd4 SHA-1: 958147bfcb8f8c5cdb1c9c50b26f429926779728 SHA-256: 64ed700173674c63f1ba96fd900d8f502366f0d5f2ef82dccf7a35e558863389
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to potentially compromised websites and disposable hosting, characteristic of a link farm used to distribute malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams or callback phishing. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities or the delivery of further malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://www.jobsincrete.gr/images/_user_na/file/72144631868.pdf In PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6383d96d96636383a4051f2cda268449/26942950983.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/7441812732.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/ripafejako.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021052001561082.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/javubiwusenanoromo.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///kirarow.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/jovaxu.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/118807001.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/75539901000.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16087d0146f354---mezaloz.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fb748f390ad0e5279001c89289bbe258/5654946717.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/17097811884.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d9002507b---wufupo.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/zinugesanigapuxijunusalu.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/mosokekamofonep.pdfIn PDF document text
    • https://telenovella-bg.com/files/18966172112.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/banefizebizumulafosibi.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/24240325437.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/nimujipotekexizaxim.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac793138056---tojorixok.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077547e5cf4e---xatufabolupawogiralolufo.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/kowuxifojezitokani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=god+of+war+2+iso+ppsspp+downloadPDF 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_off0000c7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FF 16328 bytes
SHA-256: 3a0b09adbfbf83f8c985a0becaac5d97bd8e4f2bda0819739bc6eca76c2e4a24
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 10504 bytes
SHA-256: 96f391ce747398183314d61903000c220d4f5af9e42314a9832f1501a3336bdd
font_02_sfnt_off00010a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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