Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd7f501453b1b8f…

MALICIOUS

PDF

67.2 KB Created: 2021-03-12 12:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 44dcdace3ac832bed5bfd8b3f05a3306 SHA-1: 2114896c45efdcb9aaa1d54b7185acc88565b933 SHA-256: 9fd7f501453b1b8f675598e618da187cc859243cf010cf9e98b9aee9fb68d528
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and hosted on services like weebly.com and sqhk.co, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this as a phishing or malicious PDF, suggesting the links are intended to lead users to malicious content or phishing sites. The presence of multiple external PDF links and the ML detection strongly suggest a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/123?utm_term=affair+song+ringtone+free PDF link annotation
    • https://cdn.sqhk.co/ramidazumiko/jg1v5f0/gefowupemabogebo.pdfIn PDF document text
    • https://cdn.sqhk.co/gevanadu/d8jbibd/truck_drive_racing_realistic.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/b76ef7dea2b79.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/bihj0id/jutuzugemaravumupilijutab.pdfIn PDF document text
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/wemofuwo.pdfIn PDF document text
    • http://cucoupon.info/pastry_shop_business_planp4duz.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/gjjzyge/82483897541.pdfIn PDF document text
    • https://gizazegixewaner.weebly.com/uploads/1/3/4/5/134596748/5e750961fc.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/hcidljj/lateral_thinking_test_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/kagofiwavum/u0hbvib/83563702144.pdfIn PDF document text
    • http://medway24.com/captain_underpants_toys_argosz6sdm.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/he3hiix/browser_video_app_for_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/gjjggfh/65246916828.pdfIn PDF document text
    • https://cdn.sqhk.co/rojopuvukit/Qidlgc7/grandparents_birthday_gift_ideas.pdfIn PDF document text
    • http://honbiz.pro/oggi_in_italia_9th_edition_answer_keyae6kn.pdfIn PDF document text
    • https://juxapokidopelif.weebly.com/uploads/1/3/1/6/131606881/jivoda.pdfIn PDF document text
    • https://cdn.sqhk.co/xituvusaw/ifiagc2/fosupolegujurudofolaj.pdfIn PDF document text
    • https://kixodebu.weebly.com/uploads/1/3/2/6/132682063/zakilolewunum.pdfIn PDF document text
    • http://copyrighthelpcentral.com/81059003915t3bi7.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/WOrfKGP/economist_definition_of_profit.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/0jdx3jh/nixazilonik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1C 4892 bytes
SHA-256: 3f93a54080c9aec7ead86a59856e39f33546aa6be067e1fe3fc20ba9a6afc840
font_01_sfnt_off0000dcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD1 10204 bytes
SHA-256: 45fe58fe26e59827b1c10823b7b585e4a71714dc9e588d8d5bb2cebd1b5f8064