Malicious PDF — malware analysis report

Static analysis result for SHA-256 6957aa2d3ebbabe8…

MALICIOUS

PDF

77.6 KB Created: 2021-05-14 08:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 16bdbeee98889c58b8a8f6d2514958b5 SHA-1: 610eac5285daa1f95c8344b6c23e317ae7dbcc5e SHA-256: 6957aa2d3ebbabe82a96b69097dd2ddf1e3d115e3f4c742fd00ba871685cbd51
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result, likely intended to trick the user into clicking it. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=cyber+security+analyst+salary+uk PDF link annotation
    • https://cdn.sqhk.co/jotapepikota/bkigid5/music_id_for_roblox_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/iaiiOgV/clock_face_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/puberufibo/0l5JQX8/pojelimegoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_6052e06321a13.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/jihViex/52082814740.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/fghghhg/nadasixejexesilamoramanod.pdfIn PDF document text
    • https://cdn.sqhk.co/daguvemet/g2qhejb/4963354668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_6033a41334d74.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/ggB7nji/golf_my_way_jack_nicklaus_dvd.pdfIn PDF document text
    • http://vezukugijisepo.scienceontheweb.net/21440428959.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407304/normal_5fcc41eb5f6e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5fe502bc5e27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481673/normal_6052a5ea60689.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/n9jagcd/89618551921.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fodose/attorney_authorization_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ddf106e-e470-49c2-acb1-1c646559b817/17572230374.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/zirobikuzarex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df690ca-c249-4325-b286-92e7286bb3d2/jefos.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/busaxotetezuvodapiwit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63936e6d-b8be-477e-9ea4-975b3d4fc575/john_deere_mower_blades_48_inch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6bd9c1-cfdc-4f6b-a42b-2a8e31ae9908/47258358514.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/gilded_reverie_lenormand_card_meanings.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/metformina_1000_mg_para_adelgazar.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_off0000f273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 5004 bytes
SHA-256: 2f5a6c2dc6d14bb41ba1ad39aef292bcc38c315105f2f871c458382adac4d341
font_01_sfnt_off0001038c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038C 11040 bytes
SHA-256: 54d4ca03d17fae06efacc20defae9daf19ee0b927f480034a4fdc1dc536fa4e2

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