Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8a5e9ba1ba4c79…

MALICIOUS

PDF

75.6 KB Created: 2021-05-18 18:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8fda42ac230307789aadb0af5bee0b46 SHA-1: 2cfe13b0b6b52beecf341699727bc149f3256bf3 SHA-256: db8a5e9ba1ba4c79137040bd30d83319a2f5a68dc0110dd0aed4fc0d80aece3e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or driving traffic to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a malicious intent to manipulate search engine results or redirect users. The presence of multiple Weebly-hosted PDF links further supports this, as these are often used to host malicious content. No scripts were extracted, but the overall structure and external link farm point towards a phishing or traffic-driving attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://xezojetit.ru/strik?utm_term=rachel+mae+buffett PDF link annotation
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/c16dba7a52ecae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_5fe8af57b573e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_5ff6860183d69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483839/normal_6034d2cfe2ceb.pdfIn PDF document text
    • https://xutifapob.weebly.com/uploads/1/3/2/7/132712150/gizowasuv-soledubuw-tevorowuzivaw.pdfIn PDF document text
    • https://moxatabik.weebly.com/uploads/1/3/4/8/134885740/pukezowosufixo.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/d8a3064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_60001d644940d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374963/normal_5fc87b20684d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_6054c1e38a4ef.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/a7a24e33-a71e-4a72-bb89-a19f786027d8/cognitive_psychology_jobs_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f0b0c0-dca4-4a46-85cd-7413fb0550d3/selisajubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e7fe20-1560-4dd3-bde9-6b062c45d2d0/adobe_acrobat_professional_dc_free_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3acd217-e35d-42fd-8804-4a8c38ce8ef3/zatevegumexexosupazesiwoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada30e67-524f-456a-813c-817f3b5ca6fd/fozeviwatebomevenafirola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a14e68-d40f-458e-bbe6-87fbe7a27647/15303834909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5933e95a-5975-4723-a684-dfff4a229011/lajepejeninofuwek.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_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 4992 bytes
SHA-256: 323e2016f11a4fa35ab1a650a835a44cf141c34ea9c11cce746fc991eb1067eb
font_01_sfnt_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 11128 bytes
SHA-256: 26de0b754810518b9396e5c7b51b59cf2aa05829e240b1ea61f510e79a34f493

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