Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4773ac9bddbdf7…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 16:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1f62b25cb501b1f374f45e848f3c80ba SHA-1: bcb98b7b1e03fe517c5c2c0cdda1f37c86767bab SHA-256: 5e4773ac9bddbdf746be144a1d8d109dcae5b577945de4ff84194bca37ce7369
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL, https://lozipotod.ru/strik?utm_term=strongfirst+bodyweight+program, is the primary indicator of compromise, likely serving as a redirector to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=strongfirst+bodyweight+program PDF link annotation
    • https://cdn.sqhk.co/xajamenujo/jc74hjR/44882832993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_602fc22f6fd6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_600765c4d5604.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_601a531463c71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457572/normal_602ba02492d36.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/S68rgcS/online_games_no_download_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ffc4ad37c1a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9438e66c-f3dc-49d1-b085-e8c0732a635c/20922804836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4accbc4-8852-4dec-a222-d411337cefb7/2008_jeep_wrangler_for_sale_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d5cd2ee-5824-44c3-97a5-6df7fbb3f60a/31837944268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683fc4f3-3d86-47d4-b7ea-98e848575ac9/mini_mental_state_examination_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/plastic_double_glazing_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac0cf86d-db59-458a-92cc-88d9ebf1df4d/bawawulogekowezaguvuxodi.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/53664151099.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/summer_embroidered_floral_formal_dress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750d5125-2f92-4e9a-b6f5-11c734053551/zozoxisafesologuwutifeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2525b040-ad11-4790-99a5-c05b2f859a63/what_is_the_ab_lounge_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68401635-23a9-41f6-8676-8f1bac280418/45732071635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec4465e-bc64-4a56-8d63-892d0042fbe3/26441613118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffbaa9cd-3618-49da-bfdc-a1c2d29a92ec/kopukozoxek.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/muzojeperokozabaper.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_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 5860 bytes
SHA-256: 7ba9d7ad596c6f9d3be4c7f404a82a0646a95ad54167eeff174c20fd60a32352
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 11504 bytes
SHA-256: 2d003a2e9e0d7a6bc498eaf51760c04c8dff004a641a51f4eabd61cae90ce441

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