Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89c75c88affb66e…

MALICIOUS

PDF

79.4 KB Created: 2020-12-04 11:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9ab0b69d305ebbabaa2b997f740c77c4 SHA-1: 90b649d56af744bf201916ff72b4d1ed1f256635 SHA-256: b89c75c88affb66e4ef43183707ae884e591233c27356dd59b6aca729feaa320
156 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 5

  • 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.
  • 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://trafffi.ru/123?utm_term=carol+wright+gifts+shop+now+pay+plan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f97351332898.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/3af0492767d6.pdfIn PDF document text
    • https://fudegenajeno.weebly.com/uploads/1/3/4/5/134581691/mukobegutuzalevufew.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/13b86.pdfIn PDF document text
    • https://gekitudijelal.weebly.com/uploads/1/3/4/2/134265938/1b24ace55e14873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5fa7a312c580e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_5fadaad7ca698.pdfIn PDF document text
    • https://xelabuxu.weebly.com/uploads/1/3/4/2/134235382/linarujuxeselexuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc51cce8139af03766060b3/t/5fc61211f3de5e49b53528d3/1606816282827/diffusion_of_innovations_5th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65f74ff13940aa264e708/t/5fc6a140f81c9a2a0c8d60fe/1606852928879/screen_time_tracker_wellbeing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d15e2bbd740658283cb1/t/5fc776de48d5672cfb4042e8/1606907616325/sital.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c5737848ba205d318c94/t/5fc527c43485235c866bcde0/1606756294232/94813898230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9d75c0-f4a8-4c28-a7b6-8bd72fb2134c/zamugegaxewisudisixitumus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59dd9ee0f32b874afdec/1606375902365/55427083944.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c05eb8467722f1ec93c2/t/5fc50aeb61e25426e1d6e7d8/1606748910556/toyota_4runner_service_manual.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_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 5260 bytes
SHA-256: e92fa4d6e867e0cb207c8e7ff3c65f52e6c6fc839dc66bac000725bcaa6f7dea
font_01_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 10964 bytes
SHA-256: ce803276b0a5fc85230ef3e7892d0b5e93364bc191e2702a6258bc955829d772

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