Malicious PDF — malware analysis report

Static analysis result for SHA-256 391761cbdcd24212…

MALICIOUS

PDF

76.8 KB Created: 2021-04-07 19:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb2ee8f2b7dfbf790b79f8086b6d83af SHA-1: 5cb757504ea982fe08705b6c037f06f6759c6536 SHA-256: 391761cbdcd242124ceb6483024ed624b59e72ae5b3c6f78530c4f310dda83d0
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://midufefew.ru/123?utm_term=texas+vehicle+registration+inspection+report PDF link annotation
    • https://cdn.sqhk.co/limexofure/NgfTnwU/kajewixejoj.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/13676758005.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/85176159077.pdfIn PDF document text
    • https://cdn.sqhk.co/fogizotufijo/oheYhfB/medical_english_worksheets.pdfIn PDF document text
    • http://uscarins.info/quran_word_by_word_bangla_translationbgvrx.pdfIn PDF document text
    • http://intereriia.com/wumilexudomesigyrz69.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/id61giw/creative_sound_blaster_x7_manual.pdfIn PDF document text
    • http://damvglaz1.xyz/que_es_liderazgo_organizacionalj0knb.pdfIn PDF document text
    • http://tersq.space/wuraminewudetisomufukarotk0s.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/eGTm5ji/noxetopifodivaveb.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/mafudolexifediwuvug.pdfIn PDF document text
    • https://cdn.sqhk.co/pabukerofo/0ljb8uu/fewalabivalari.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_759365305847446eb86ff01b74bf267b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/24028004676.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/mizosorivig.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/kefolija.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/dowerebowivizut.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/what_new_games_are_coming_out_in_2020_for_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/88795021666.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_398e0a4936014774906d1e27107faece.pdf?index=trueIn PDF document text
    • http://winimoviwimi.myartsonline.com/78306413419.pdfIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_75630bbaa82644c5a957d73660589b31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/what_is_the_word_for_speaking_clearly.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 5272 bytes
SHA-256: 25a03d9937fd91b3f5a2bcefb34ebf64b88c99354dd9f622bc566035f37d3c30
font_01_sfnt_off00010049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10049 10900 bytes
SHA-256: 79467609cd0715f12ee2ee7145d46d9e922d92ee975f7d215b8e772641b6bcba

Open this report in the interactive analyzer, or submit your own file for analysis.