Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c5be1bac76a30e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-28 01:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 59dc921bcd3483a0c2b72d8aa18a2b90 SHA-1: 96ed09904124a9c6aecc68eaf8cc5c5d68216760 SHA-256: 97c5be1bac76a30ead622a21ac32eb1d54fd8042ed33f58c580cf71b25299811
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=algebra+2b+semester+exam+review+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474999/normal_60403f362ee7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_6003d7f3aa1ae.pdfIn PDF document text
    • http://lagujegivupani.22web.org/84471987304.pdfIn PDF document text
    • https://reboxulowewo.weebly.com/uploads/1/3/1/4/131407709/davovolob_wifora_begituzejasimaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_60550ea0246ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd15639c70ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_600fb67e4eba5.pdfIn PDF document text
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/salavawovos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_6026f65e32fd5.pdfIn PDF document text
    • https://jibozupokolojub.weebly.com/uploads/1/3/4/6/134667483/xoragimudefe-jelekaxevuna.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/63b5e45a9.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/9368936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5feb720ac4139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_5fe930dce9617.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/ragimadepaxerapen.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_cd4baa6bbb68414d930f712f7bf6a3d7.pdf?index=trueIn PDF document text
    • http://rajiwewovipu.epizy.com/rivogosilinolulikezoruvu.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/bullet_raja_ka_bhojpuri_video.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_c682285adba144a7b823f69d18057c3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/wazuru.pdfIn PDF document text
    • http://gawuvuv.epizy.com/nefowujulafuteg.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_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 5484 bytes
SHA-256: 850209cd928b2adfe85ac393aef4e4bc083eb5e8973e93a3b32186547fafbbe3
font_01_sfnt_off0000ff5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5A 10888 bytes
SHA-256: 9d85091ecb67a36c4e83c25be39b683c9145ece6d674c83ac919f4ca94cfc012

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