Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0eb3e33f7fc150…

MALICIOUS

PDF

72.7 KB Created: 2021-01-07 07:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 1d4bf17a82c42c8b9f31897d6ec2e874 SHA-1: cb64c5bc0fa3c27777c96bda6169b52ead357e8b SHA-256: ac0eb3e33f7fc150199d42fa4ff43d6e110f8e943b15f33b4ae01db512e4a9b6
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/mozel?keyword=best+secure+vault+app+for+iphone In PDF document text
    • https://cdn.sqhk.co/benibavagoge/mKThjjf/knowledge_is_power_cz_ps_store.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/buhj3Qn/racing_go_kart_engine_starter.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/9hfhxig/segagevopejulifetolubuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/dkbiaWC/tilinupifavavuleko.pdfIn PDF document text
    • https://famimiketavow.weebly.com/uploads/1/3/0/8/130873946/4751044.pdfIn PDF document text
    • https://munevamowiwefan.weebly.com/uploads/1/3/4/4/134440094/8c8b613.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/Cigligj/alarm_clock_free_download_simple.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/eb55c19e-e746-4fab-b3c1-0a4fdaa5ed7b/artisan_of_kozilek_ultimate_masters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09f9f56-d3ed-4560-97b0-75237d3de179/geometria_analitica_ejercicios_resueltos_circunferencia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9303b6e-a0f6-4e8e-9062-2fd19170a02e/straighterline_college_algebra_final_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba580eb8-3dad-46df-a545-13fb49c7468d/bakidiviwiwodilofusis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f10bd02-8571-4aa1-b49c-26e08e67c577/90721769912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3cccc9-840b-4be4-bd1d-c444cbafda60/system_analysis_and_design_11th_edition_tilley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b7ee1b-60f3-44a8-b48c-e97f6f536c50/luwadekezakatotulakokifiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12386983-385e-4887-81e0-2a7f3b2add46/stylish_font_apk4fun.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_off0000e031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 5212 bytes
SHA-256: b089fc87d1e5e6bffe11f67656b2edea1d6cd35c008dea2e101bbe99b2288442
font_01_sfnt_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 10476 bytes
SHA-256: d114cbc936b24434f702f6fc41e194472f0f347aa0b9a23d1c8e365ba104c81a