Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfea3734d1fa070…

MALICIOUS

PDF

75.9 KB Created: 2021-03-30 21:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d6ca211b28ddf46ee258ea55012fb72a SHA-1: 572c43581299f2e47d280f52362cc716b19498df SHA-256: 2dfea3734d1fa070dd95b3e9ddd88d40288d57e42d044d9347ac8154ace78e02
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating it is a link farm designed for phishing and SEO manipulation. It includes lures for MFA or callback scams, and ClamAV detected it as a phishing trojan. The embedded URLs, particularly 'dugedepap.ru', are likely part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://dugedepap.ru/strik?utm_term=how+do+i+find+my+tsp+account+number PDF link annotation
    • http://nonretloli.site/how_to_get_lg_washer_to_spin_onlyz3rpd.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/PPidgjn/the_woodlands_umc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451563/normal_600d3f2060c73.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/bf1zy36/84715249792.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/Agi4Jji/ahm_250_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/buveguwoze/Rhdhbhf/xevezoxekibifarapujozuwes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470211/normal_5ff4061eaa936.pdfIn PDF document text
    • http://ro-shop.space/1236931555jxdoy.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/adUQjjj/free_syfy_movies_on_youtube_full_length.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/idhdEDC/jomibolimijowufuto.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/jfV5wha/clark_griswold_christmas_shirts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_41437c7d810d4362950becd9aef0d739.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c46147-c95e-43ae-bc24-ee6e8dfb4fa0/fesabanasebuzimagomonoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03ee29f-d94d-47b6-99d7-a32d6a1d31ac/jakizakagivedez.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_f4f91544db014271ad8fe716667b59b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae567637-cea5-428b-bfa9-d720063b5662/ledafolumeboduge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9802dd32-2b36-4378-9a2a-41a3777183c5/simile_metaphor_personification_worksheet_with_answers.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 5564 bytes
SHA-256: 57dd5f96608cb5a8f5b9da52aac301aaccdd432cd29769b80ad1730cdce2d4ad
font_01_sfnt_off0000fcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB9 11288 bytes
SHA-256: 4671745f7d37eb755ffe55eac174c1d879708db994d962e16dd3fd9180827060