Malicious PDF — malware analysis report

Static analysis result for SHA-256 d824bce06b375c74…

MALICIOUS

PDF

76.0 KB Created: 2021-04-24 04:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 458b9b3823f76d7d2ea3bd43dcf700a9 SHA-1: 2e1e5f831332621c30e76be74a788fdbedc9d157 SHA-256: d824bce06b375c746d31ebd40f51f082a70739fcc74b5d6d0e5a92312798414e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and embedded links, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to be a lure related to quantitative research methodologies, likely intended to trick users into clicking malicious links.

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://druttle.ru/strik?utm_term=what+are+the+5+methodology+of+quantitative+research PDF link annotation
    • https://cdn.sqhk.co/wenegifuteg/iiWYhhN/dialga_best_moveset_pokemon_diamond.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/hjiAD1Y/dizozikajamegiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426676/normal_5fffb8fb1984b.pdfIn PDF document text
    • https://gaxiliwila.weebly.com/uploads/1/3/1/3/131383945/gotufuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_6015d7ded012c.pdfIn PDF document text
    • https://zotizoju.weebly.com/uploads/1/3/5/3/135349435/juvavejo-ramafupido-wasuzepe-sujokozijudak.pdfIn PDF document text
    • https://lusekovipe.weebly.com/uploads/1/3/4/2/134234723/9650769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_6033eeb24f4d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_6064b4318a162.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hGjdygd/wovezepera.pdfIn PDF document text
    • https://cdn.sqhk.co/molofagaji/hhCapia/beginners_guide_to_twitch_streaming.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/josuwifemewajab-gobus-zuxeni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc7927f0acb7.pdfIn PDF document text
    • https://cdn.sqhk.co/fofanibiv/ieq0thj/gexape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445321/normal_5fffcc5967d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_604f6e6399aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422659/normal_6044658da7549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_604e884058f7b.pdfIn PDF document text
    • https://mewejubakokexal.weebly.com/uploads/1/3/2/6/132681976/votelixip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijadosib.epizy.com/dell_1320c_toner_reset.pdfIn PDF document text
    • http://foridifakusexum.rf.gd/74569564763.pdfIn PDF document text
    • http://likijanima.epizy.com/25924579748.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_off0000e929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 5860 bytes
SHA-256: 15dc771fde8596789be4c9b9848aacf7391a77bfdaf971038ea9ddf3ad9cd13b
font_01_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 10888 bytes
SHA-256: 44298722cd7dcd568958eddb48d701b3cd274ca053b60ec809f19b4eb5e4efe1

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