Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3f45da2eca8ca0…

MALICIOUS

PDF

97.5 KB Created: 2021-05-23 07:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f06d37ba1ece68aba0361cc70774ea5e SHA-1: 155f9d343a585247d8bf86297a219cf16fc5dedc SHA-256: 3f3f45da2eca8ca01db9cec613351bf71790fede82784d6ded87c9a8fb167c15
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://baarspo.ru/strik?utm_term=how+to+tell+if+yeezy+350+v2+bred+are+fake PDF link annotation
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/gogujuxadimoli_tozexil_tirobupur_keremaba.pdfIn PDF document text
    • https://luxovifawus.weebly.com/uploads/1/3/4/3/134341193/sebudujipus.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/8a8d607a9daaec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_603aae10e091d.pdfIn PDF document text
    • https://wotakowa.weebly.com/uploads/1/3/4/8/134885303/newunekivarivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_606aec187de35.pdfIn PDF document text
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/wapiwituti-lakowebuj.pdfIn PDF document text
    • https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/3d5941bae7560.pdfIn PDF document text
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/4388212.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/abb33.pdfIn PDF document text
    • https://topuwozusap.weebly.com/uploads/1/3/4/8/134869447/dubive.pdfIn PDF document text
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/0e9d81.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/d0508.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/e84fddf8b82.pdfIn PDF document text
    • https://numesenara.weebly.com/uploads/1/3/1/0/131069843/5724673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420612/normal_5ff3c3dde2468.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/8368969.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/supikidugofomagoju.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/6dff84e2-7fb9-4853-a1cf-acafeac380c1/the_death_of_ivan_ilyich_essay_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7eb01a-40e7-47ae-a3a5-04d523115668/35745956549.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_off00013c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C76 5752 bytes
SHA-256: a4454cd399d141c75f8b42f1baeb676ed03fbc5b0457177b04b8f42f8b1cf90b
font_01_sfnt_off00015045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15045 11424 bytes
SHA-256: 923f4a061c2a2c3eb48fc5a1b3ffaea6ab54356da2a3f673c562fd66bdc90950

Open this report in the interactive analyzer, or submit your own file for analysis.