Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa819e90575a39f9…

MALICIOUS

PDF

70.7 KB Created: 2020-11-20 02:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5f9f308e24015fe26122559359f2a57c SHA-1: dd98f76c66c98fc1766bfa1496919b226edd0c37 SHA-256: aa819e90575a39f976d9a4375a4b7131d575266d634f2c5c38b8790aa40368a6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffi.ru/123?utm_term=watch+wimbledon+live PDF link annotation
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/5866029.pdfIn PDF document text
    • https://rovalexi.weebly.com/uploads/1/3/4/5/134598456/2544e0.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/3936009.pdfIn PDF document text
    • https://goraworozegisu.weebly.com/uploads/1/3/4/3/134324811/mokuwivok.pdfIn PDF document text
    • https://segapokepex.weebly.com/uploads/1/3/4/6/134649200/ruvalupuwud_pozovasi_bakaximapuku.pdfIn PDF document text
    • https://tipiridevozono.weebly.com/uploads/1/3/4/3/134349557/xirogifufome_fugexabetiteza_xokijamip_zozenalikalixi.pdfIn PDF document text
    • https://vozumovoso.weebly.com/uploads/1/3/4/5/134506012/jukawopozor.pdfIn PDF document text
    • https://fevulawem.weebly.com/uploads/1/3/4/7/134714475/wetorusipuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7b91d309-c08f-4ab3-8676-affce86b8e15/juegos_pc_1_link_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/23042015264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/590a4bbf-656c-4fcc-ac96-b4a512dbc425/tsm4_guide_classic_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a60b8f-d772-4d6c-9a90-65fb9ca0d368/65147295075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56bd537f-7ee2-4ad5-a5d4-3f957967871d/medical_assistant_schools_in_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b95e8f-3e98-4ae3-8473-eef8db72a61d/22139517484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb86702-aa6a-4dc2-969d-38e5089dd095/50979288475.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A5 4996 bytes
SHA-256: d1cbb52a276fce1f4c83d8ae00f5b6c26ce429dacbbf5f9f54091ccca28b9877
font_01_sfnt_off0000da8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 11064 bytes
SHA-256: 89c072d997d4b0feaf67a4f97eaf43ad49cc5d85bc95b4ab8819019852e1ac87
font_02_sfnt_off0000feb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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