Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a26b875904219c…

MALICIOUS

PDF

84.6 KB Created: 2020-11-26 04:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1a89478d2c12380738d19a572d6e43c SHA-1: d8f512e5a9d40afc8ff8b70f7ff2accec5b4d82b SHA-256: b6a26b875904219c64198363f0b92507f52b1c93fa615ef559177271d029d676
206 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 0.9992

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffnew.ru/strik?utm_term=westinghouse+outdoor+photocell+timer+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467926/normal_5fa3e8df24cfc.pdfIn PDF document text
    • https://bupigesow.weebly.com/uploads/1/3/4/3/134360728/5814145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f8badcabceef.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/lakajidirelusu.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/jivigixava.pdfIn PDF document text
    • https://josafobuwevaj.weebly.com/uploads/1/3/4/4/134464642/310945.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/voxasonapazupege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369316/normal_5f90903f30de3.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/lekoxutawaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/05bb7156-448e-4e5a-902d-66bd7be8ecec/frases_mas_comunes_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c432127-cde9-4b1a-91b5-0cea85b80e3f/67222222897.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/odia_song_site_2018.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
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6D 5172 bytes
SHA-256: 1dc537aabb78d18cf28f98d486b09e821766d9366afa5d12656be74f2a420883
font_01_sfnt_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 20800 bytes
SHA-256: 06d0dfe9cc43c835eb4323e0accf9b1ec01e8e82859de0fbddb7825f87188db8
font_02_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 4988 bytes
SHA-256: fcc805a3ed87ce4cf9d46111108c894951e776bcb67c20fa466bda31f54f66a3
font_03_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 10388 bytes
SHA-256: e4cc39fd4ffb08a9f9f971eda6e61b1ad35f16f391d10af7e61d41316a053c64
font_04_sfnt_off00013605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13605 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176