Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e8ac4182a06af6…

MALICIOUS

PDF

79.6 KB Created: 2021-04-03 11:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f33c4a6acda883d0254b91b8a7e6111b SHA-1: 74888a6672f47a368ee7f3b8508c437581227e9e SHA-256: a9e8ac4182a06af66c1d930f9a67041860544ef0c44d603dc7a3531c27f3d677
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://crophysi.ru/wix?keyword=mayfair+guide+pro+apk+download+2019 PDF link annotation
    • http://wutigesekigaj.22web.org/zumobovifimuforuk.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/eiePPRc/how_to_get_free_gems_on_episode_ios.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/case_study_on_borderline_personality_disorder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_60563d3270199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411480/normal_5fdfaa553f2df.pdfIn PDF document text
    • https://cdn.sqhk.co/minutakumu/ljgaihd/73311749383.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/Jee24jg/bob_dylan_crossing_the_rubicon_lyrics_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423732/normal_600037f16fef1.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/9jijbjj/20582759656.pdfIn PDF document text
    • http://bozesedixek.mywebcommunity.org/filivizibililimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407316/normal_5feec3d03f332.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/4a32c95f-616b-4096-b8cb-f5a1da5727fc/35669185671.pdfIn PDF document text
    • http://kimizajoveso.epizy.com/vusibasisa.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/483206316.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/spreadsheet_compare_for_excel_2016.pdfIn PDF document text
    • http://rabuxudizuxu.epizy.com/23734688932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753b791a-93d9-40f5-862a-c08035e4003a/67886872105.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/gijutunur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45a19eb-6616-4766-b345-2d699574266a/vilidajal.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/lamefudukeloworiguvasatek.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB87 5776 bytes
SHA-256: d63dd2a0a78ca6170e8eb3c0761bde2cb2ecbbed07e8cf365844e7f518cb5784
font_01_sfnt_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 2052 bytes
SHA-256: 4a17a7bea81cbb84febfe931496c7bdde979a397aefb5396f9c06e18d6a627ec
font_02_sfnt_off00010921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10921 12072 bytes
SHA-256: 70121ee5997c6176c9b30dcaadf28b17426f4dea4eae7ca4343276e127b9f0e9

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