Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3a0674701dddd3…

MALICIOUS

PDF

84.8 KB Created: 2021-03-07 10:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f3d2276bfd69357b901fc409bddba96 SHA-1: 644ae7e5f472cca46df58e26dfff6e13cb83cd88 SHA-256: 3a3a0674701dddd38038365d4e7fba38f3b04e456dfa27527696470abd66f6ee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely leveraging embedded JavaScript for obfuscation or redirection.

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 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.
  • 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/aws?utm_term=what+is+the+meaning+of+god+the+holy+spirit PDF link annotation
    • https://dorenezawux.weebly.com/uploads/1/3/5/3/135383086/d18bf29ec0.pdfIn PDF document text
    • https://dorizusedi.weebly.com/uploads/1/3/0/7/130776489/rekowamozepu.pdfIn PDF document text
    • https://gojenejanoz.weebly.com/uploads/1/3/0/7/130739654/b1ad9ae12d0e34f.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/mafobi.pdfIn PDF document text
    • http://posalak.22web.org/wasosodejekaxadisurora.pdfIn PDF document text
    • http://summ-green.fun/jusuxotrmq5g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5fdc4bad46782.pdfIn PDF document text
    • http://mekapetakosa.22web.org/acc_hyperlipidemia_guidelines_2018.pdfIn PDF document text
    • http://smm-target.ru/el_desafo_del_amor_365_das_gratisciyzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_5fd97a5a2176c.pdfIn PDF document text
    • http://mirror-x.org/does_ipod_nano_work_with_itunesmsf5k.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/483686cd-6eab-463e-a559-577288231df3/what_is_wholesale_trade_durable_goods.pdfIn PDF document text
    • http://naxokagad.epizy.com/16605443690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9cb9f1-e231-427b-a45b-3e22067f571f/27443237550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c41644-92aa-4cc0-97c4-6ae23207b75b/roald_dahl_the_twits_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/wepapujosusefobas.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/82382366903.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_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 5568 bytes
SHA-256: 7d8758b326bf87299e5e84313c487bff4f36a492b5c50bca989f9f65ddcd6ca6
font_01_sfnt_off000119cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 13572 bytes
SHA-256: 07293fbd2a2e9d9e919a415659ec99e762d51b08312bffcf13b733dd5720dad7

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