Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ac364f82ec1a82…

MALICIOUS

PDF

80.6 KB Created: 2021-02-27 06:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 654f303dbf2cfd85077b3e1d4cb14084 SHA-1: 25ad8a33ac660476bd7268523fe28a89b0c0df83 SHA-256: 88ac364f82ec1a823d5f63dfebef7282cf9bdf0bda2b91e214f7fe15898306d9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=hp+elitedesk+800+g1+motherboard+pinout PDF link annotation
    • http://mivejuvididu.66ghz.com/fifty_shades_of_grey_3_soundtrack_download.pdfIn PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/1bffd2737974f9.pdfIn PDF document text
    • https://pupoximoz.weebly.com/uploads/1/3/4/5/134584835/0164072a.pdfIn PDF document text
    • https://gilemana.weebly.com/uploads/1/3/5/3/135319463/mexudajog_nixibubivolob_sepewokedet.pdfIn PDF document text
    • https://zunimivivonuz.weebly.com/uploads/1/3/4/0/134017399/jiwaxokudimolezoxol.pdfIn PDF document text
    • http://wixotuvotinunu.iblogger.org/92267412413.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/c_data_structures_and_algorithms_cheat_sheet.pdfIn PDF document text
    • https://wezusutuxalik.weebly.com/uploads/1/3/1/6/131637092/28e5babc.pdfIn PDF document text
    • https://jubitire.weebly.com/uploads/1/3/4/0/134017652/2954089.pdfIn PDF document text
    • http://jofosisajagov.iblogger.org/99643362057.pdfIn PDF document text
    • http://makukenumeg.22web.org/xakatugamuxafalekar.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
    • http://rumuzuta.epizy.com/tesla_model_3_performance_carsales.pdfIn PDF document text
    • http://sipukerafabule.epizy.com/jolijofupapeno.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/bharatanatyam_songs_come.pdfIn PDF document text
    • http://gisivem.epizy.com/535399140.pdfIn PDF document text
    • http://zexizel.epizy.com/factors_to_consider_before_buying_a_business.pdfIn PDF document text
    • http://rirukezuruxemuk.epizy.com/geziw.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_off0000f03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 5808 bytes
SHA-256: 2283bb7213e02960d14d5d44745826e26cfd05ae792726fe53f6f0d4e316fc33
font_01_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 10236 bytes
SHA-256: bf2f68228279bdd977f3175828700b5c03f9db134a4cd3ed76f89bd8e4514e8c
font_02_sfnt_off000126e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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