Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa736081f57e428d…

MALICIOUS

PDF

74.3 KB Created: 2021-03-10 00:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 150c9e64a239df3f452e5b8e356a7c9b SHA-1: 2753caddf088340f03d0f91bfea8fda9fca1e914 SHA-256: fa736081f57e428d092af467c0b5da49411108971e8c205947218035b115aca4
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to salary information, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://mezovuduw.ru/aws?utm_term=interior+decoration+salary+in+canada PDF link annotation
    • https://cdn.sqhk.co/lajoroteb/jaha1hi/98755419996.pdfIn PDF document text
    • http://pycnidwzxc.info/69749560648w6wcf.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/6ef44660.pdfIn PDF document text
    • http://hookup157.site/how_to_really_listen_to_music_reddit245nr.pdfIn PDF document text
    • https://bitokulizawefe.weebly.com/uploads/1/3/4/6/134684274/8344936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5fcc8eaf6507d.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/igcidjc/wolo_horn_button_installation.pdfIn PDF document text
    • http://juxefagag.22web.org/nuevo_uniforme_pureza_de_maria_bilbao.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/djcDibC/nascar_heat_mobile_mod_apk_data.pdfIn PDF document text
    • https://gufogirim.weebly.com/uploads/1/3/5/9/135967500/60b8440f60.pdfIn PDF document text
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/ramese-wakevadam-sujorajejo-zikimumodozab.pdfIn PDF document text
    • http://kyukty68.xyz/tesibopigamuvekiguvj2vpf.pdfIn PDF document text
    • https://wunovolal.weebly.com/uploads/1/3/5/3/135311751/foredabu.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/vebar-xulufevovetumem-dilelazegisum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_6012e29337779.pdfIn PDF document text
    • http://verifiedbadges-form.com/red_alert_transformers_toynpm9t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lowoxewepabetex.rf.gd/gafisuro.pdfIn PDF document text
    • http://zixoxajoredipub.epizy.com/atlantic_monthly_poetry_submissions_guidelines.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_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 4972 bytes
SHA-256: 1a1a1f43ba97dd1d42d5bf0751037422b5d2904ce213271e19151d1de1b25f48
font_01_sfnt_off0000f87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87F 10520 bytes
SHA-256: e3ba9a8be6898f4008f68a7c2d9e149bb5ed6b40e7f05c06a978986655657d6e

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