Malicious PDF — malware analysis report

Static analysis result for SHA-256 0674ffbc4b3d729f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-21 02:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c16404e7d1123ea8a98442d5d2ed675 SHA-1: 2ef3e1977848ae8e4b6591282493613c8c11567f SHA-256: 0674ffbc4b3d729fdf3bac5230e79696e50dddfd9faa737ca257b1fe17bc08fc
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 0.9998

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://xezojetit.ru/strik?utm_term=sears+riding+mower+parts+near+me PDF link annotation
    • http://xejopegig.mypressonline.com/38176954580.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/4fgco1h/cooped_up_movie_story.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/ja48Giv/5096788377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_60412db5cecb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417312/normal_5fe25097d6fad.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/13238497341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372072/normal_5fed11af6ae47.pdfIn PDF document text
    • https://zakifamo.weebly.com/uploads/1/3/5/3/135318304/rujuzodulumudasazux.pdfIn PDF document text
    • https://cdn.sqhk.co/givefugonuw/hF1zBge/morevuwixu.pdfIn PDF document text
    • https://gexemuxu.weebly.com/uploads/1/3/5/3/135394015/1497853.pdfIn PDF document text
    • https://kiragidemi.weebly.com/uploads/1/3/0/7/130775435/d63313dce6d5.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/xikuri_zezisojebax_lasetazivod_duxatolaxit.pdfIn PDF document text
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/rawebunegejijit_pudimurosuzumos.pdfIn PDF document text
    • https://bemujegifa.weebly.com/uploads/1/3/5/3/135312506/5c4a79a6c.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/2dgdChb/wopumajabakofunapik.pdfIn PDF document text
    • https://voxudipuxun.weebly.com/uploads/1/3/5/3/135319737/7ba87bf.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/85389913598.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/zodawanuror/constructive_and_destructive_interference_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/zazanakivulotepe.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/xofumijexu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 5444 bytes
SHA-256: b8d54430b1b14a7051bef2dfac4837c16d6ba8c0cf8b758013f483ce7a45c820
font_01_sfnt_off00010135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10135 10572 bytes
SHA-256: 78bebf79da078472608411305542458711a8173a32cb5d02c19aa06961fe55a2

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