Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e87a964ff607e0…

MALICIOUS

PDF

89.5 KB Created: 2021-05-06 07:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bd14093f84e00184a9c6e4780675d734 SHA-1: 73ca44340560cbe95d6837a585baaa561d9e8fe8 SHA-256: 82e87a964ff607e0ced4f23ee4520a3ab93edab6bf7f9af3647ba9a963b4d14a
146 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a callback phishing lure. It contains numerous embedded URLs, many pointing to disposable hosting services, and the document body, though truncated, suggests a technical or schematic context that could be used to disguise a malicious intent. The presence of multiple PDF-specific heuristics, including a link farm detection and ML classification, strongly indicates malicious activity, likely aimed at tricking users into contacting an attacker.

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 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://xezojetit.ru/strik?utm_term=boss+ns2+noise+suppressor+schematic PDF link annotation
    • https://cdn.sqhk.co/bujasugawo/cYhbIOG/sigivexowatiludidaret.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/fShxDh3/best_beard_trimmer_near_me.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/bizunubutip.pdfIn PDF document text
    • https://kawapojironene.weebly.com/uploads/1/3/1/6/131637385/radulixuf_sawojedidu_vizagaz.pdfIn PDF document text
    • https://sitobewabaxepok.weebly.com/uploads/1/3/5/2/135295681/3366227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5fd76fced155e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_60017c1e0f633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_6022d94a42e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_606d902824ad3.pdfIn PDF document text
    • http://wildboost.club/tevesalact41k.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/9908833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458829/normal_602e3edf93dda.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/4hl4Zgh/82709322548.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/igiij5T/31477428680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_601cce10bb4b1.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/radametebekuxxytuu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5ff259ba7ddc2.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/a449483f-3720-438a-b8dc-4443aa832e83/70355409380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d6d7ea-9fce-4a4f-8a2f-094c211e1b3a/mevexalivopezak.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 5324 bytes
SHA-256: a6f3eb08ba1091cd13b48c77a0e5af9bd74e9f7f3f37b09d86125cc1811aef30
font_01_sfnt_off000118f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F5 12372 bytes
SHA-256: a2649ad459577090ed1021e335d5373670ec0715c479553d27c7c370b2fe85c4
font_02_sfnt_off000141e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E3 16132 bytes
SHA-256: 4f6d6443d667672870c38ce4e1d364e29e61a0df6fd2d8217a47270b9fff04c9