Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1f08040be5d750…

MALICIOUS

PDF

82.6 KB Created: 2021-04-03 05:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 62b7ab13c8ea14e3b65c61b40681744a SHA-1: 3d00a08a53880410a989806f8e14516427d621a3 SHA-256: 8f1f08040be5d75032548bc82bc9a782453c710eb93c1f28ae52654295fe890c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, forming a link farm, with a primary URL pointing to `https://soxebez.ru/wix?keyword=ghost+train+ultra+waitlist`. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content, suggesting the primary purpose is to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=ghost+train+ultra+waitlist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503578/normal_601266274219d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486344/normal_6000a85d1bc6a.pdfIn PDF document text
    • https://tusovaxurekugu.weebly.com/uploads/1/3/4/9/134900319/tikewupewiwemo.pdfIn PDF document text
    • https://jajujawu.weebly.com/uploads/1/3/0/8/130813132/pusadiji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474989/normal_5fe0d531ae0d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fffd24c32892.pdfIn PDF document text
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/tadonalig-genenunazuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462350/normal_5ff30cac07d1f.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/95910051015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475212/normal_60307ffd34626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_6046a2d36f042.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/calcific_tendonitis_shoulder_exercises.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/the_millers_prologue_and_tale_translation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5fc8c5f0e982a.pdfIn PDF document text
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/2f2aeaefe0f99.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/8969a5c7-e183-4b3f-a1f3-0fb395ef74c3/20477089272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2470c434-f37b-4693-bc2f-89a06ee8c6e0/82343048272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6499fbea-081c-4216-8a26-11f66a44b322/software_development_engineer_amazon_job_description.pdfIn PDF document text
    • http://sadozejeko.myartsonline.com/14159478708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfc20f2-f0e1-4872-a869-942f93944523/bepalaxidinakir.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/engine_bearing_failure_analysis_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32cd326e-dfb4-4436-9acc-44bb4415db20/how_to_change_epson_l1300_ink_pad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a25f95a-ec2e-4feb-983a-a3996117e04a/neburuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f946c0c-3aa9-4e9e-96c6-a2c5a27cd73a/17028043881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d849d08f-9943-48a6-b5fb-1afb67bd8e3a/xavax.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_off0000f99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 4660 bytes
SHA-256: 61401c77a010715712ea88ac9aeee844d4a2f7a3c424090908682d70a10d2e14
font_01_sfnt_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 10772 bytes
SHA-256: aaa7c726095ba9af1b03fc05385c4af4009405c2a2a63717c51f309fa9974a2c
font_02_sfnt_off00012e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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