Malicious PDF — malware analysis report

Static analysis result for SHA-256 d483d54a876a1438…

MALICIOUS

PDF

71.9 KB Created: 2021-01-06 08:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0d73b468f23e210d403c9ea84c380da5 SHA-1: b301c1a82c539d20d7d475367aa5ca928ada8721 SHA-256: d483d54a876a1438f7a225d49cab4d1be563c537d62ab012bcc2af292b3bfc38
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, including one to 'traffset.ru', suggesting an attempt to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or ad-fraud.

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 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.
  • 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://traffset.ru/123?utm_term=absolution+force+online PDF link annotation
    • https://cdn.sqhk.co/pufowuvikij/VhaOhjI/blue_cross_blue_shield_maternity_coverage.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tiladejonu.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/hgMijyo/94798153231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5fe73b506c3f2.pdfIn PDF document text
    • https://guzuwifaxad.weebly.com/uploads/1/3/4/0/134096987/6c7189bbdb51.pdfIn PDF document text
    • https://nemusadepupozug.weebly.com/uploads/1/3/1/4/131453027/789bca882b323.pdfIn PDF document text
    • https://guzavubovusev.weebly.com/uploads/1/3/4/6/134659469/valiwuwuwi-zuduxer-negalebigoxive-zukojugizel.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/popopujax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f9fa65f7d2a5.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/zixebalibox.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/e6b0f839-87cd-42e0-ad84-843c0328c9e4/89530689814.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/vidmate_app_apk_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb07713-bc99-4d92-b030-c7167e5eb69b/lg_led_hdtv_32lj500b_tv_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/51936198164.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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 4796 bytes
SHA-256: 93f2e5dc5bd44b820f69efafa4003e4118b2e3c57aac6da335e955b2f874d980
font_01_sfnt_off0000ed28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED28 11044 bytes
SHA-256: 2faf1df4ace9f71457bec72af96474d2f9703f21636777b2cef27f2f7b0d1348

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