Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75cb9e544e08c64…

MALICIOUS

PDF

73.1 KB Created: 2021-06-14 08:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 456c25394daaefa9fbcb7f311687948a SHA-1: d989d4b27878efeb2156a8f9110ecc51656fb37f SHA-256: b75cb9e544e08c64ee540d350692efa96c7aa40a05a5f7f622a2d068f6f0d3d3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary suspicious link pointing to 'https://pistant.ru/pbw?utm_term=jim+jones+el+capo+download', suggesting a lure for potentially harmful content. The PDF's structure and the high number of external links hosted on disposable domains indicate a link farm designed to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pistant.ru/pbw?utm_term=jim+jones+el+capo+download PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4374980/normal_60b70ef57663f.pdfIn PDF document text
    • https://gigomafokat.weebly.com/uploads/1/3/4/7/134717504/rawejapojerekufut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_6067c93282387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_60c6e9ca60cf3.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4453914/normal_60b12e7211c85.pdfIn PDF document text
    • https://dosijusesuxola.weebly.com/uploads/1/3/4/3/134305349/1876878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5ffca5eb32f07.pdfIn PDF document text
    • https://kinamolifurepe.weebly.com/uploads/1/3/2/7/132710726/zefunutipepilit.pdfIn PDF document text
    • https://nunifabemavi.weebly.com/uploads/1/3/4/8/134871907/513fd.pdfIn PDF document text
    • https://xasevezivim.weebly.com/uploads/1/3/5/3/135302984/simevuxulovavi.pdfIn PDF document text
    • https://garixapevawena.weebly.com/uploads/1/3/4/4/134495328/34a51a0519.pdfIn PDF document text
    • https://zeleveruki.weebly.com/uploads/1/3/4/8/134898901/botetoguwam_xomiguxezig_lejumal_rijudonax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demopefo.pbworks.com/w/file/fetch/144528357/why_my_pressure_washer_isnt_working.pdfIn PDF document text
    • http://zuwuzemoj.pbworks.com/f/into_the_wild_krakauer.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/el_sobrino_del_mago_resumen_por_capitulos.pdfIn PDF document text
    • http://xizegopago.pbworks.com/w/file/fetch/144890364/friendzone_thailand_full_movie_sub_indo_download.pdfIn PDF document text
    • http://barumena.pbworks.com/f/24956552816.pdfIn PDF document text
    • http://motewutoma.pbworks.com/w/file/fetch/145278948/47522354949.pdfIn PDF document text
    • http://mifudatu.pbworks.com/w/file/fetch/145113852/clash_of_clans_apk_mod_hack_version.pdfIn PDF document text
    • http://wapajuj.pbworks.com/w/file/fetch/145283901/td_6_download.pdfIn PDF document text
    • http://raravisu.pbworks.com/f/69473011689.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/w/file/fetch/144659319/55747969285.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_off0000dc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC14 5280 bytes
SHA-256: 9604854d318ec1a337a5d7fb95c94bba356495902693762c6d2844f8bce9facd
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 11488 bytes
SHA-256: 3ccd4607268bdfeac4f9016b4470d21e2587304bd8c16122369bd372d2d5f979

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