Malicious PDF — malware analysis report

Static analysis result for SHA-256 689296ab2ead8a38…

MALICIOUS

PDF

69.8 KB Created: 2021-02-15 09:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bf6f6750271ebda0b3645c8fd3229c19 SHA-1: f482f3370a7019a59d1a0b8efd8e9788c4151674 SHA-256: 689296ab2ead8a3838af0c802f6446c0d33666705e9121b4a51aa0cec623cf1e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs, with one notable example being https://jottigo.ru/123?utm_term=indiana+state+fairgrounds+coliseum, suggesting it functions as a lure to external content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting.

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://jottigo.ru/123?utm_term=indiana+state+fairgrounds+coliseum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427523/normal_600aa4ae67ef5.pdfIn PDF document text
    • https://vamepaxokuwi.weebly.com/uploads/1/3/5/9/135959455/tosonikon-pijabonudem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447079/normal_5fe153012eeea.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/55aad79edf.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://kipixuge.epizy.com/act_practice_free_study_guide.pdfIn PDF document text
    • http://degivenumi.epizy.com/best_voice_recorder_app_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/definition_of_data_processing.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/flatliners_2017_imdb_parents_guide.pdfIn PDF document text
    • http://kovudefimure.rf.gd/17050099189.pdfIn PDF document text
    • http://buxazub.epizy.com/duwukusebefuvek.pdfIn PDF document text
    • http://wapudajikipidem.epizy.com/wosow.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/2338371389.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_off0000c4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D6 5160 bytes
SHA-256: eaca002ba0ba4e393368ef108ad79b017a411a3dee93b9c0a337b20e30f98559
font_01_sfnt_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 11128 bytes
SHA-256: e5f5e21535d0f9c17e4cf4743e606a0811f5d3b6a47016648e482cf37429055c
font_02_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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