Malicious PDF — malware analysis report

Static analysis result for SHA-256 a412f975e58c7324…

MALICIOUS

PDF

97.3 KB Created: 2021-05-08 17:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 450fa1aa6b1bfd9c3741c1a942f679f8 SHA-1: 5b8c50cea92780f23c1d1beb52a726db6ea0bf40 SHA-256: a412f975e58c73247cc03cd6c08683df4aab199d25447d202bc804d5dae30c82
156 Risk Score

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 0.9964

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://jumiwimov.ru/strik?utm_term=behringer+x32+main+output+routing PDF link annotation
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/pavuv.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/5504406804.pdfIn PDF document text
    • https://kisivapatefiru.weebly.com/uploads/1/3/4/3/134333063/79fdb13a9665.pdfIn PDF document text
    • https://tujuwofaxeg.weebly.com/uploads/1/3/2/8/132814826/gekegaza.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/WQifje9/world_lawn_bowling_championships_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/deliwewofok/iXO3Xe0/jorokelonokefok.pdfIn PDF document text
    • https://kejojotevunujip.weebly.com/uploads/1/3/1/8/131871587/vuwelufozudujim.pdfIn PDF document text
    • http://wuwadipuzemorib.22web.org/causes_and_effects_of_flooding_in_ghana.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/eijxjag/92437147878.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/jidhgf2/cfo_jobs_nyc_real_estate.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/ramutofaxes.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/85063879298.pdfIn PDF document text
    • https://cdn.sqhk.co/susopavazane/shiXgh9/vevodazasiginixonu.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/wizedumi/endangered_animal_worksheets_free.pdfIn PDF document text
    • http://begilokikilox.rf.gd/18290553303.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/46702865972.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/10032934835.pdfIn PDF document text
    • http://fonezitugomal.rf.gd/zatolezoxoliwifiv.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/bobunizaditoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/92960046786.pdfIn PDF document text
    • http://lawigut.rf.gd/xokok.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/whatsapp_watusi_silver.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/after_the_love_has_gone_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/is_mortal_engines_worth_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/cardboard_cat_house_template.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/rutatibuzejajoku.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/raxerufubazobo.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_off00013d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D47 5436 bytes
SHA-256: ff7ddb4bb34b9b6e37c3353030a3e750937236310aa3296e56b749ac98f599e2
font_01_sfnt_off00014fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA3 11640 bytes
SHA-256: 2384cc362202d50a8957b11cadf33bc836e2f87255689280dbad080ef5518810

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