Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af51b60140e3493…

MALICIOUS

PDF

51.4 KB Created: 2020-11-03 04:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 884ea9bb6816be787e43075c025d60ff SHA-1: 11c82071f33f01b0bd13a766a75a76c8d9c02f73 SHA-256: 6af51b60140e34935b2b90f3e8c29cc591a4ea31c94a35676234c6f3cb04b564
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?keyword=panasonic+plasma+tv+troubleshooting+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5f9fd1c19e165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5f891ddb4b031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f8854c794392.pdfIn PDF document text
    • https://xomipuladijig.weebly.com/uploads/1/3/4/4/134401164/podikevo-mabiwexepagigem-mijep.pdfIn PDF document text
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/xawefi-latedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f872aad19f86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5f9451d7da4dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7922/0382/files/apex_learning_answer_key_english_9.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/approach_to_gi_bleeding.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/bihar_si_pt_question_paper_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d28df48-e848-4648-b1f7-9aaed55dabd6/maxwell_relations_thermodynamics_derivation.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/80966485452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e676c3a-c602-45d9-9b38-62e28c0312fd/paxunula.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/forgotten_realms_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/0206/0703/files/69419987682.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/common_prefixes_and_suffixes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7894 5568 bytes
SHA-256: 782d93323673931fefd0399b890f108aba2c5616b3fbefdb1a12ec5920e0c495
font_01_sfnt_off00008b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B49 11496 bytes
SHA-256: 4ecc7708323ebd3b65b282839f2936af38b7ba26742a655980cc18f07ece3b9b
font_02_sfnt_off0000b270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB270 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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