Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bccfcbaa712760e…

MALICIOUS

PDF

77.2 KB Created: 2021-06-10 23:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 816262af21d1b469bd33d692b3f9d4a0 SHA-1: 162d97d76f8eb3a102f1df1e9b51e3ff3075dee0 SHA-256: 4bccfcbaa712760e9ef827f78e2f40e731472361d3a7d43ba7fae11e4c5d6f22
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, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deceive users into clicking through to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://wastran.ru/pbw?utm_term=pokemon+xy+psp+download PDF link annotation
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/aa39fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483359/normal_6007ef5379ae3.pdfIn PDF document text
    • https://juxepikipoz.weebly.com/uploads/1/3/4/4/134486641/rewuduvas.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4487905/normal_60b28b987e94f.pdfIn PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/6ba56c237210.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/efce1cd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_604a83153b571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_6015ec31cb6e0.pdfIn PDF document text
    • https://geduwitanezuter.weebly.com/uploads/1/3/0/7/130738684/jegegunoxezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2723e0fe-e0db-443c-9fc9-2ecbf22448eb/how_to_open_kaba_mas_lock.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/w/file/fetch/144784329/excel_finance_dashboard_templates_xls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b3caed-ac3e-4db9-8a47-c77d14181995/omb_circular_a-87_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a32bed-3b75-4e8e-9557-6a5267922ff2/brother_sq9185_bobbin_size.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144722916/rudolibuxitabef.pdfIn PDF document text
    • http://pibadaro.pbworks.com/w/file/fetch/144505791/51412823493.pdfIn PDF document text
    • http://xegosigex.pbworks.com/w/file/fetch/144645588/random_fortnite_accounts_free_ps4.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144508902/los_titanes_dioses_griegos_de_percy_jackson.pdfIn PDF document text
    • http://bajaduxaxusi.pbworks.com/f/how_to_setup_extender_tp_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf7afb3-536e-4217-922d-bb5e2ce67f03/51184002928.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144525936/xefudat.pdfIn PDF document text
    • http://subazim.pbworks.com/f/mivazonobowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4d66c1-2b51-4fee-a1f9-cf198be8b936/fekijijarovofovajopajozip.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144457929/sasezilo.pdfIn PDF document text
    • http://nimojugaf.pbworks.com/w/file/fetch/145051413/rab_ne_bana_di_jodi_movie_download_link.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 4996 bytes
SHA-256: 78d106b6f315cf1b67a9468ad800988a49823faaf106f42b05f4a2113af1e386
font_01_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 10900 bytes
SHA-256: 6a022716fd150855a3b6558dab07574a89fcd52e6c094dd0a7ff862d3e1c78c7
font_02_sfnt_off0001196a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378