Malicious PDF — malware analysis report

Static analysis result for SHA-256 7680ea4631167351…

MALICIOUS

PDF

105.2 KB Created: 2020-12-11 21:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 53a6033e8b9dbc285bdc3a4fb020b0e9 SHA-1: b4d1e92c8d52119b339aba9c7949cb3a5af6a24f SHA-256: 7680ea4631167351bc9cf587ddfcafca384764ae39793a0b7c6ddb3c2afc78c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffnew.ru/strik?utm_term=ancient+chinese+food+inventions PDF link annotation
    • https://kepupumi.weebly.com/uploads/1/3/4/6/134616340/a0e9972.pdfIn PDF document text
    • https://wusiparopebabo.weebly.com/uploads/1/3/4/5/134505529/6e4f9bc5d332f.pdfIn PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/9309662.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/3fd78ef2-296f-4615-acab-a221633e48f6/47498774181.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc592a72e34347c706420e1/t/5fcf20250ff3944fc553d6cb/1607409701272/knightscope_robot_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf56e68bfc518616729af/1606219119617/preventic_tick_collar_best_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfcd93570fb44d1c93f2f/1606286553804/be_thou_my_vision_in_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce4ae3e-b6ad-4b6e-b361-fe35c8673f93/fatal_bullet_dissonance_of_the_nexus_trophy_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2866a40f1034a5cb33d7b/t/5fc53f859b1ed0353888b848/1606762374320/joel_osteen_jokes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ccaa239b07229152d4e0/t/5fc8e5384b883311951a0c46/1607001401164/online_master_s_degree_in_education_technology.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bebbcd1e280355d37542/t/5fc140a99d79364840bb7010/1606500522412/hope_is_the_thing_with_feathers_-_314_by_emily_dickinson_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1e09fbdb33045eec91c30/t/5fcd216a7ae85b53b299975e/1607278954743/between_the_lines_lyrics_gwen_bunn.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_off00013ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EC2 9852 bytes
SHA-256: 867645ec1ee7a7e098b441bfcb762529c846f42f95dde79798523c8b7adff40c
font_01_sfnt_off00015ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF0 4820 bytes
SHA-256: 40db16b6d98a50522d848af8ae30b4aaf15d51269aacc102de980ec72e1d6bf4
font_02_sfnt_off00016f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F66 13120 bytes
SHA-256: 37497a833c42b91baed87d9679409bf4a1eec5e1aef6aa11b9322ff833a64e1b

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