Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dae1f4ab1f2fc17…

MALICIOUS

PDF

83.0 KB Created: 2021-03-18 10:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b7fa855f54e3bc259bf115eafa6b6417 SHA-1: 0a8cea991ba3dbd07b6c9a7419e47adad09a1cd0 SHA-256: 0dae1f4ab1f2fc176d9477c9893de7fb946911c48845f054d1cf3c7b7891c47c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam pattern. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=aptitude+test+questions+and+answers+pdf+for+mca+freshers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fcc536057b15.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/irregular_verbs_in_the_preterite_practice.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457311/normal_6006213f2ac48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455396/normal_5fe1c81284089.pdfIn PDF document text
    • http://zexulenulo.22web.org/emotional_intelligence_test_for_leaders.pdfIn PDF document text
    • http://zoxulojiliboro.22web.org/bsc_part_1_physics_practical_book.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/22008644934.pdfIn PDF document text
    • http://xazonem.22web.org/71327298032.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/carrier_chillers_manuals.pdfIn PDF document text
    • http://noxugimeto.iblogger.org/cytoplasmic_male_sterility.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b156f3c-c821-4470-adb1-6206124f137a/57312674543.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/goodrich_tamassia_data_structures_and_algorithms_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/wamadegavuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/dove_bell_ringing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6630f655-9f93-4e38-b590-82e2450e5eb6/lujewuxazexamita.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/61600802066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f745b4b-fcf0-4fb1-92e4-1b7aaadf9a13/living_in_balance_facilitator_guide.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_94a55b5cb3044d898888d5e11995a9be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/50064259311.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_ca16e7db74de4b99ac862d7628e6accc.pdf?index=trueIn 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_off000102a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 5568 bytes
SHA-256: f779b470263a551789e1a78b3191e51913079919676f0e0739ed7c6ce39ea1ab
font_01_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 11424 bytes
SHA-256: b08ad52236c4a3797ccd5f0e56d65847c55684155f62a7497e332e5440a0ac7c