Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c37f353102312b6…

MALICIOUS

PDF

78.7 KB Created: 2021-05-23 15:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8b2cb1929eae102a84e378d70a49c4b9 SHA-1: d8a9148367f1e3127e62950e67bdf89041d7fbc8 SHA-256: 3c37f353102312b6bff537a743f90595415e5c5f67d80747347a94374f09ae6a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://botokaw.ru/strik?utm_term=swtor+mercenary+leveling+build', appears to be a lure to direct users to potentially harmful content. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or spam campaign.

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://botokaw.ru/strik?utm_term=swtor+mercenary+leveling+build PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370284/normal_6051ecd0e2eab.pdfIn PDF document text
    • https://matowesefuwuw.weebly.com/uploads/1/3/4/5/134592497/xuneturokoz-fikadatilijano.pdfIn PDF document text
    • https://viropozokuputaj.weebly.com/uploads/1/3/4/4/134441516/be15c00234e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387932/normal_5ffb10c17da85.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/lineron-gafimaxid-vejifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_601e43e8c99cb.pdfIn PDF document text
    • https://ribebofav.weebly.com/uploads/1/3/2/6/132681502/2182862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_6017790f0ef2e.pdfIn PDF document text
    • https://pimujupaz.weebly.com/uploads/1/3/4/4/134440235/jilipatutavozop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374542/normal_6002db0751668.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/5499707.pdfIn PDF document text
    • https://tajewarupimef.weebly.com/uploads/1/3/2/6/132681391/42ecc946be59b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_6045bf1dcfe20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_602f4fb70c519.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/9267931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_6049b3ff9bee9.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/87c6097c-a95f-4bf6-8309-900e81e66844/9013816021.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 5576 bytes
SHA-256: 5cd578b73ad317b8234413176514cc0af1b640e15f1d50ffb1ddff27b1966b1d
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 11036 bytes
SHA-256: 6325a9bf2656107db2b8796dcd654a2f9228503e649603b724b93d1f5cba450e

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