Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7d7e0405d26fa4…

MALICIOUS

PDF

75.8 KB Created: 2021-06-04 04:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9fd362d5c8866bbdc96092a5b1eda9d4 SHA-1: d957c0c163bf71c50c62ebc7c36bde443588588c SHA-256: fa7d7e0405d26fa42ba5a9294252b4dcb2084dda0b2e7808292f98784bc1e974
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://irlanc.ru/pbw?utm_term=past+simple+and+past+continuous+exercise+with+answers PDF link annotation
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/wovej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_6032e17c1dda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_60241ef8daeaf.pdfIn PDF document text
    • https://fevufimekosiso.weebly.com/uploads/1/3/1/1/131164497/408341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_600cc1ff8ae3e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4423431/normal_60b2150c5087c.pdfIn PDF document text
    • https://lenudigibelap.weebly.com/uploads/1/3/7/4/137499492/kunizogiserina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5ffa6220edb9f.pdfIn PDF document text
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/sasirewigobu.pdfIn PDF document text
    • https://jutasosunefobe.weebly.com/uploads/1/3/4/0/134012390/lugexaron-libusanotexutak-tolinub-rovajife.pdfIn PDF document text
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/nutoginiluxo.pdfIn PDF document text
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/sinaru.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/2934378.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/zubupezuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_601b210562d90.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/cc190242-8e57-4256-9e96-6d932bf37516/61371631930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4fadc3a-ff63-4d46-932c-333ddb308f69/benimafa.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_off0000dcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 5356 bytes
SHA-256: 9630a808192e5639f1aa9e936d1e2aec66be3bcd428299d8f8154b2a23cb6f02
font_01_sfnt_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 10840 bytes
SHA-256: 48bc795fb62f9cdf21736b91b36b20f95721a8e7c1298f377530dbbb8be3f3e2
font_02_sfnt_off00011394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11394 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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