Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b48e92409dafabd…

MALICIOUS

PDF

74.2 KB Created: 2020-12-01 06:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d33ab21f072002771f276ab20e4132a7 SHA-1: 04f665e8e4aecf6218820795d95a381e27e3fc8f SHA-256: 3b48e92409dafabdc68b8f00b92926e84bd3440d184b6f3e8723d5dfda908a8f
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://trafftec.ru/123?utm_term=osprey+farpoint+55+day+pack PDF link annotation
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/dexagezilatafo.pdfIn PDF document text
    • https://tezugigawezen.weebly.com/uploads/1/3/4/8/134878192/86646f.pdfIn PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/noxigexemedize.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/wudipikex.pdfIn PDF document text
    • https://lufokozu.weebly.com/uploads/1/3/4/7/134755413/fuxarobobut_xagol_sedidajozamavaw.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/vebufez_pedob.pdfIn PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/tixiledekawowaj.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/dobano-kalut-votapegif.pdfIn PDF document text
    • https://lunogowome.weebly.com/uploads/1/3/4/8/134859941/7393185.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe6b9018e72e5fdba8a52e/1606314896979/wexolafajupet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd052300f7af3919d4a08b/1606223140102/wuvefusupogulik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fc1321b2dd96f59181aa4ed/1606496796070/virelenagetadujumubuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8553a632-bbae-4a45-8f02-d1be132de6fc/40049828651.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 5224 bytes
SHA-256: 514321fd3d5b013ef7b9c1b90c5b25bda9c9d255f76a0a7a8015f2001ebe6ce2
font_01_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 10624 bytes
SHA-256: e6950888e6e6edaaa1f3f30455da32a002777c7fe71d72d986505f581387ad87
font_02_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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