Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9f6bcf4653fd4b…

MALICIOUS

PDF

75.2 KB Created: 2021-04-15 23:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 84c570c1da92001eae6b89b7d9da3db5 SHA-1: 2556a1639ca80f83d5b33b6f50172a196888a7ab SHA-256: 2f9f6bcf4653fd4b9db7fbfb081fb844e350d41cf2795021c8ae8469204f87eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple URLs, with a primary focus on directing users to a site related to the '16 personality test'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or scam attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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://xezojetit.ru/strik?utm_term=what+do+the+letters+mean+in+the+16+personality+test PDF link annotation
    • http://farozemirig.scienceontheweb.net/famepedusisefo.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/blowin_in_the_wind_ukulele_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_5fe70fb1c552a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_601604c14064e.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/IidhhnH/using_smartthings_app_with_samsung_tv.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/juban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470830/normal_5fe99d2682b57.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/rezado.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/Nidibgg/best_civil_war_battlefields_in_virginia.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/muzzleloader_magazine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_ad44785503e842238923bd7ba2caf4e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4429a13-ad96-4492-8b9a-e49fb937e20a/citizen_skyhawk_wr200_manual.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_33fc398bc3384a07be2c72573f21ec0d.pdf?index=trueIn PDF document text
    • https://ac911ccd-a574-46a9-bbb3-57bb927ff796.filesusr.com/ugd/2735c9_453141ef1c764417a9a07ff344b40b98.pdf?index=trueIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_7cc37759f4dc42dab6cd484e30f4c4ed.pdf?index=trueIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_a7acb9041faa43aeb0f1ee9f8ae60ee2.pdf?index=trueIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_d57f253d84a84f18a30ecf9614d2751a.pdf?index=trueIn PDF document text
    • https://9d03b195-5c34-4993-8a23-519dd2bddccd.filesusr.com/ugd/9ac058_1136358ea2cd41339bbf79e92135b88f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0aa8e5f-b898-44a9-959e-ca7d5a607c16/dominos_twisted_dough_balls_recipe.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_off0000e7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 5520 bytes
SHA-256: bea6ca4d9d4316ea62ba68c64f14a9e9a8f0e83685d06b03a017e1320fca4bb6
font_01_sfnt_off0000fa76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA76 10724 bytes
SHA-256: 4049b409886383e706e33146dcfd555ebe533df4e1717f6aa01e7289c9e3e188

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