Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e0a4c6f4b0d6e0…

MALICIOUS

PDF

78.6 KB Created: 2021-09-14 18:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 317f4398ec111c8ecb2a3b273991c0b9 SHA-1: 8ff69f18b365bedc913158fcb00d0ebb66f0cc13 SHA-256: 94e0a4c6f4b0d6e04be85e5c2e457c798700ebe7be141a18079d049111f0cb51
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document has been flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of link farms hosted on disposable domains, suggesting a phishing or content-luring attack. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and SE_CALLBACK_LURE heuristics further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://queure.ru/uplcv?utm_term=types+of+angles+in+parallel+lines PDF link annotation
    • http://creaorganization.com/depo/sayfaresim/file/sekisa.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/tovoson.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/gefubafakejanebuwenuw.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ed2466f04---fijizupajirijudibosomozin.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/538777450.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/dewafajekiras.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133960af2acf---popakoz.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/korogesefojepenomuto.pdfIn PDF document text
    • http://medi-sen.com/files/files/54087235497.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/rosezibujoxes.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/54618244542.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/64201017553.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/jogarorafizuvipolowo.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/53803305826.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613acf5864d0a---39304474980.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/28226357796.pdfIn PDF document text
    • https://nezamirekhaseafoods.com/userfiles/file/2955812644.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/8766319411.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/94122110865.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/silow.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/57360429113.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/73670747999.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/7c9bff0db15e241f893fb41a50854c80/zifid.pdfIn PDF document text
    • 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_off0000cd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 18360 bytes
SHA-256: f0e580e5be89cf4e2535c7dddc0ba397d2a439a2a2070eb2d6d568bdca812fc7
font_02_sfnt_off000115a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A8 10512 bytes
SHA-256: cd8ffb1e179d6890014f66e95e4595c9dc19c59c201b8ece21e23c004a4bcce4

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