Malicious PDF — malware analysis report

Static analysis result for SHA-256 60090445edee794b…

MALICIOUS

PDF

72.7 KB Created: 2021-03-12 11:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: abb9aa3f8f3538b0377986d5c1e463e0 SHA-1: 5d689385e52dd6c95632f3240b1a5367f9577f3b SHA-256: 60090445edee794bc9054556e95ffdd963423cd81354155b7a2bb03979372687
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 0.9996

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://dafemum.ru/award?keyword=learn+colors+in+english+pdf PDF link annotation
    • http://wudibuniwiwu.22web.org/tom_clancys_rainbow_six_siege_xbox_one_review.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/jiwepuwenizewilu.pdfIn PDF document text
    • http://ru-1.casa/806385207934pyxa.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/gowexeji.pdfIn PDF document text
    • http://ru-payment.casa/tudodowigubawobog1w5rk.pdfIn PDF document text
    • http://grandov.pro/senelumakute8z6z.pdfIn PDF document text
    • http://zosazufinur.mygamesonline.org/ordering_numbers_1_100_worksheets.pdfIn PDF document text
    • http://trastenmyqort.online/femegajikanfq2sm.pdfIn PDF document text
    • http://pubgmobiie.com/jbl_stereo_speakers_reviewvidow.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/deformers_trophy_guide.pdfIn PDF document text
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/6417366.pdfIn PDF document text
    • https://derajuxojop.weebly.com/uploads/1/3/1/4/131452827/kaxijijebidiri.pdfIn PDF document text
    • http://sfhgfje5df.xyz/les_quadrants_abdominaux_et_leurs_contenus4efdi.pdfIn PDF document text
    • http://prodson.space/pufavebomunaz7g1z8.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/364c2.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/389858.pdfIn PDF document text
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/mefurusa-vifutemevobor-lijubikufifeji.pdfIn PDF document text
    • http://itasda.online/68616094681os4aj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://piwapikefiraxi.rf.gd/86723922264.pdfIn PDF document text
    • http://vexidolovosope.rf.gd/camila_cabello_romance_album.pdfIn PDF document text
    • http://lupugavediroz.rf.gd/fuvuxunogumowatevonoge.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_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 5360 bytes
SHA-256: f05f120bf12c12d43afd5cc230a9d8a137392e989b5d829522cc8dcdaef6a38d
font_01_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 10192 bytes
SHA-256: cadaa7b6c853a313f6033220fd487e12da08e15b53c037518569910882bd9425

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