Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5acaa360aefa34…

MALICIOUS

PDF

74.1 KB Created: 2021-03-12 10:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 274780b6be6a2eece10c3bcc261067b8 SHA-1: b387fb86136d722a74fe29cf12b9723c6247c2c5 SHA-256: 6b5acaa360aefa3436f1836cc3eb7cc0ae7842942e9d0ed94a45e67da17b5f3e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains numerous external URIs pointing to potentially malicious domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=sociology+as+a+science+pdf PDF link annotation
    • http://thestablestl.com/16156264330887r4.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/android_jquery_is_not_defined.pdfIn PDF document text
    • http://pressit.space/373423668649d4c0.pdfIn PDF document text
    • http://kurs1.xyz/fituzijogewiy95lw.pdfIn PDF document text
    • http://tertov.xyz/8757353202yrr8.pdfIn PDF document text
    • http://useplafond.xyz/ser_un_lder_efectivookxqu.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/hollow_knight_scarab_markers72b5.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/balsamiq_mockups_full_crack_for_windows.pdfIn PDF document text
    • http://help-copyrightservice.xyz/epson_5030ub_4kkg95q.pdfIn PDF document text
    • http://fastdonwload.space/2101171918kaog4.pdfIn PDF document text
    • https://cdn.sqhk.co/mowukirew/gKGjijb/afarinesh._org_reading_test_6_answers.pdfIn PDF document text
    • http://gk-kuban.ru/39939138186mb1sx.pdfIn PDF document text
    • http://aycotoro7.xyz/how_to_connect_mackie_mixer_to_laptop95zsw.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/nunofajozavubivilisuxis9w6gu.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/gjczii8/oscar_nominations_2021_best_actor.pdfIn PDF document text
    • http://cz-nitrof.website/ligevuzeveron7rei6.pdfIn PDF document text
    • http://5dradio.ru/31192098059vsr9v.pdfIn PDF document text
    • http://yandex-delivery.cc/48763915899604aw.pdfIn PDF document text
    • http://triple-doska4.club/35593593535adtre.pdfIn PDF document text
    • http://fruit-ita.fun/4_inch_binder_spine_templateths19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 5432 bytes
SHA-256: 30371d626204f5c69c70acf1ea70382306de5cb4084df0c99424808ec99a4f55
font_01_sfnt_off0000f8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 10176 bytes
SHA-256: e4380e19ca246ddb470d0e57c5c757856fc1c6753c26ed915e03a2702f4c6b06

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