Malicious PDF — malware analysis report

Static analysis result for SHA-256 559919107db6773e…

MALICIOUS

PDF

70.7 KB Created: 2021-03-29 11:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f9d33ee6f58874664f2ff77841d86a2 SHA-1: 848f9822b304f16d2d71650e624f1eaea3fd3552 SHA-256: 559919107db6773e9107b6df9140589d07fe4cb58afffdc2411fd14ed22b321e
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 0.9997

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://jottigo.ru/strik?utm_term=dynamic+bible+study+methods+rick+warren+pdf PDF link annotation
    • http://wijofotezopadik.medianewsonline.com/simple_past_tense_worksheets_grade_4.pdfIn PDF document text
    • http://masito.space/zusagoloya5vt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373511/normal_5fcc8b2210a8d.pdfIn PDF document text
    • https://wanujonoguj.weebly.com/uploads/1/3/1/6/131607110/5618641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459175/normal_600879813f998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ffbd4727ceda.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/87206645965.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/voxefekafolovinufus.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/mejoviwebo.pdfIn PDF document text
    • https://vilabusifa.weebly.com/uploads/1/3/0/7/130776169/nirupemiximow.pdfIn PDF document text
    • https://voromelub.weebly.com/uploads/1/3/4/8/134872571/5576041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_6057dc35c0b08.pdfIn PDF document text
    • https://wonaxegem.weebly.com/uploads/1/3/6/0/136049801/kotibufokigarula.pdfIn PDF document text
    • http://nuverlites.online/tcl_tv_android_reviewttkjl.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/9416164.pdfIn PDF document text
    • http://repair-foto.ru/ark_aberration_mapw2dx0.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/f291d988e3eeb93.pdfIn PDF document text
    • http://natgood.space/48257190309rywqy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_b8a466a189d24cc2869aeebe69c54f72.pdf?index=trueIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_27a6d1c8fcdb433da36c00b840dea37e.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_41b57d64a04c49d1b84f527c381ca2a2.pdf?index=trueIn 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_off0000d6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CB 5792 bytes
SHA-256: 3a3d4a7f988868e1bb30787946c50c0b6c1408fc1b69e3664639a514965ff7ea
font_01_sfnt_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 10420 bytes
SHA-256: 668dcfa5bdc4a5ab0272d6de47f08ef537c48afc53e1ec39f0323c76deec2f04

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