Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87dd5f6c87fb42b…

MALICIOUS

PDF

89.8 KB Created: 2021-02-15 08:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e37808db9672e4d9d487047a7174f72e SHA-1: 4c4e110f0b4517490f920d59cc84bee63faefaf3 SHA-256: e87dd5f6c87fb42ba515e22f034f52a434900fc797e0a6388a48d3d20210ad7d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF's structure and embedded URIs indicate it is designed to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=a+planet+of+mine+guide+deutsch PDF link annotation
    • https://cdn.sqhk.co/rowavarop/l50ihjb/26401638677.pdfIn PDF document text
    • https://tipoxuxol.weebly.com/uploads/1/3/0/8/130814923/4512131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_601b359b8e0db.pdfIn PDF document text
    • https://xidekudogigut.weebly.com/uploads/1/3/4/6/134683706/9471562.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/6349345.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/74136949074y69r4.pdfIn PDF document text
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/ketem_zigukavezaten_xuraferuna.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/2mPgche/best_free_game_recorder_for_windows_10.pdfIn PDF document text
    • http://autocredit.moscow/kezukufojukeborifodudirrdi95.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/hiheSie/linear_regression_in_r_with_categorical_variables.pdfIn PDF document text
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/makinutukeduta_zuwuzifodeweno.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/53dad50b9e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/emjakHY/environmental_incident_report_form_template.pdfIn PDF document text
    • http://podarokinsta.site/lulidejevijabaninivazavoxd4ioj.pdfIn PDF document text
    • http://steelsho3.club/320554212307ee11.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12242 5464 bytes
SHA-256: 2e27028a0d15a4affb1d2dacc30ec8c07fcb5bb2e5c6b9434aab0cf6e4a8ee33
font_01_sfnt_off000134bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BB 11064 bytes
SHA-256: cbf0d321fb537a17b25eb3ade852f0807de94ab38c04517e6a44f465dd61c4e4

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