Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d50fcd6f3d1790a…

MALICIOUS

PDF

75.6 KB Created: 2021-02-26 20:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 89acc7019815544df57c7dc69a997f62 SHA-1: bd21e4698fa547d4da32bc5eb73e00307c2b2b7b SHA-256: 0d50fcd6f3d1790a13fedfa5fdeb292ac809385da169e042e633ae48f1cb186b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, redirecting users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://maypoin.ru/wix?keyword=1v1+just+build+with+guns, is the primary indicator of the attack pattern, likely leading to a phishing page or malware download.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=1v1+just+build+with+guns PDF link annotation
    • https://cdn.sqhk.co/xejadukoxeta/4jgifig/5863602032.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/eGjj7hh/badlands_1973_movie_online.pdfIn PDF document text
    • http://icub.tech/jubanumiwurobatuduwejaraizw40.pdfIn PDF document text
    • http://workshop-fb.ru/ratio_word_problems_6th_grade17qm1.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/hggjhig/ice_hill_endless_xmas_funnel.pdfIn PDF document text
    • http://christmas-gift.ru/ramexotijelodorr4hh.pdfIn PDF document text
    • https://cdn.sqhk.co/webunojixisa/UjaMlSJ/nosetew.pdfIn PDF document text
    • https://sasadonosixez.weebly.com/uploads/1/3/5/3/135332683/jelixunaloladofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450042/normal_60000e9792045.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/jhhgjf1/slice_the_pie_app.pdfIn PDF document text
    • http://arenaprobet.com/clearstream_2v_manualnkowd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 5104 bytes
SHA-256: 92b0b2542fd47dc53e561b595046027e377a5dbf4cda98ec27fff88aba0a52c7
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 1964 bytes
SHA-256: 1d18534733479c870a78c46a90b83ed8aff410c3511f6838c5b83347f92bfa48
font_02_sfnt_off0000fe44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE44 10296 bytes
SHA-256: 938669831fed92b111e4c2a24687daca167f325743cbc7bc999a628133ea458c

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