Malicious PDF — malware analysis report

Static analysis result for SHA-256 b146c6588722f87f…

MALICIOUS

PDF

82.2 KB Created: 2021-03-17 03:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ba8be359955db9450ee4dd5f2a9f040 SHA-1: 169c033e2ea47efc58e4f5b20356b64fe7beee8f SHA-256: b146c6588722f87f2ab53563e7049dbf9f084a126ad0dab7ec1e08964f73e1da
126 Risk Score

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 0.9992

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://botokaw.ru/wix?keyword=heritage+middle+school+maryville+tn PDF link annotation
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/6699730.pdfIn PDF document text
    • http://bioforce-co.site/siwalelamakobeqznl.pdfIn PDF document text
    • http://tasefile.22web.org/63715677575.pdfIn PDF document text
    • http://logoped-samara.ru/is_ps_vita_worth_it_2020se7sw.pdfIn PDF document text
    • http://sulelufisumi.iblogger.org/essere_anticonformista_in_inglese.pdfIn PDF document text
    • http://gdztut.com/410364861688jky7.pdfIn PDF document text
    • http://lnstagramsupportlives.com/34872574841r8c7n.pdfIn PDF document text
    • http://sluzhba1.net/84667037774sq6va.pdfIn PDF document text
    • http://zoosalon.org/teri_chunariya_video_song_320kbpsdfwfg.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/559037.pdfIn PDF document text
    • http://uuuuull.space/fuzzy_fox_cross_stitchni0us.pdfIn PDF document text
    • http://daddytestit.xyz/ankle_rehab_exercisesbzho4.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/babigat.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
    • http://sobogasitizi.epizy.com/guide_post_hotel_low_moor_bradford.pdfIn PDF document text
    • http://lobobojisuwifip.epizy.com/30046365757.pdfIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_af6069ac4a9444caa92cf6776100569e.pdf?index=trueIn PDF document text
    • http://nuzesadoz.rf.gd/51664046445.pdfIn PDF document text
    • http://wapinogure.epizy.com/tipex.pdfIn PDF document text
    • http://winulinimax.rf.gd/dixiwibib.pdfIn PDF document text
    • http://jifujurudale.epizy.com/lekitina.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/piano_sheet_music_for_beginners_amazing_grace.pdfIn PDF document text
    • http://pidazedovag.epizy.com/35933887183.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_2a152d4616ad4b0aa5382f0cb3be1ef6.pdf?index=trueIn 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_off0000f472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF472 5264 bytes
SHA-256: f690c877895dd391f671a3bb4e9ff189898d0a89904dc661974b4df0fe2b83a6
font_01_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 11412 bytes
SHA-256: 9888b67a0e7520b04b8e9d2d4da073dbeb2c109c169f1a6b1ebcea71cfa301f5
font_02_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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