Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff965ced86a60484…

MALICIOUS

PDF

73.2 KB Created: 2021-02-15 05:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fdae978e7db49e38c23fe96ff03d96f1 SHA-1: 0b6b7890260f3df66c0c009595da206d32331628 SHA-256: ff965ced86a6048431f1877a56eb1d89d95196430ac79ab7af9978e660040f8b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a redirector link to 'https://yafferge.ru/wix?keyword=safety+first+guide+65+convertible+car+seat'. Another heuristic identified the PDF as a link farm on disposable hosting, pointing to 'http://zoxuditavuvov.rf.gd/jajozapomeg.pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=safety+first+guide+65+convertible+car+seat In PDF document text
    • https://goginaderexikez.weebly.com/uploads/1/3/5/3/135306094/nefojobom_bipasun_pakigojuvur.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/mobisoz.pdfIn PDF document text
    • https://mokegeninu.weebly.com/uploads/1/3/4/0/134017711/5ab32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480397/normal_5fd275c40f86e.pdfIn PDF document text
    • http://1yamal.space/gibbs_free_energy_calculations_worksheet_answersuqmw4.pdfIn PDF document text
    • http://creampiepow.club/scared_jeremy_zucker_piano_sheet_musicvg5oq.pdfIn PDF document text
    • https://vimitorumu.weebly.com/uploads/1/3/0/8/130814921/botulupebowaden.pdfIn PDF document text
    • http://goldstein.capital/50747483643z16r2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoxuditavuvov.rf.gd/jajozapomeg.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/cymatic_audio_lp_16_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/broadsheet_brisbane_hotels.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/puferolududilarataluzal.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/phase_1_and_phase_2_biotransformation_reactions.pdfIn PDF document text
    • http://tiwufuwivuvuf.epizy.com/life_cycle_of_a_flowering_plant_worksheet.pdfIn PDF document text
    • http://xatonidolib.epizy.com/nepaka.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/beat_saber_custom_songs_list.pdfIn PDF document text
    • http://damugiwixosaxo.epizy.com/fekowuvu.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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 5872 bytes
SHA-256: 24d1fdff26bd6b1bb4f775a300de532dcbe5ba877af8a2f0ec262a1fcca76b55
font_01_sfnt_off0000f572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF572 9908 bytes
SHA-256: 9b3042be249abc2943c5d1d05e411e75e7f1fd83196a13f85d3f62db3ca02982

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