Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7afeef469187dbe…

MALICIOUS

PDF

71.1 KB Created: 2020-12-14 17:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fb7c2e6ea62f4708b84d7134d259b7a7 SHA-1: 52903d2d6ea3d7bfddc6f2c3c426fbe1c2ec4571 SHA-256: f7afeef469187dbefba4062a4909475084b3daeb7d6d284d9e003bc61677f7bc
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=chaa+certification+study+guide+2020'. Additionally, ML classification and ClamAV detection strongly indicate malicious intent. The PDF also exhibits characteristics of a link farm, suggesting it's part of a larger SEO-based malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffmen.ru/123?utm_term=chaa+certification+study+guide+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5fa363397f6c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fc05ec717cfd.pdfIn PDF document text
    • https://bitifuzafaf.weebly.com/uploads/1/3/4/4/134488734/purilus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5fbadc2d73825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8735d01ca61.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/fadexotari_bomedelorebome_kixaronegoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_5fa5f3957f573.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://static1.squarespace.com/static/5fc71ab9791da6493f689901/t/5fcf78bb0ff3944fc55bd09b/1607432379926/bubble_tea_pop_up_shop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc1c009173fb5383be3d603/1606533130149/isotonic_contraction_definition_heart.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f8ee085bf90c0e173f98/t/5fc908cf559adf3c25e1e0d2/1607010512711/starlink_satellite_launch_live.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52a73570fb44d1f9727b/1606374056052/premier_pet_fountain_instructions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c91192c50b1a1e906058/t/5fc5cc4764571256540506ad/1606798407990/benavabakemem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f5bb92c50b1a1e84fb95/t/5fc6d9ff2ac13f1ee9a95e40/1606867457819/suvelavoxegexokixovanelu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe23d8cb3e0f577117d669/1606296537769/leluti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd2c30b6b03258f2f7c3b/t/5fc3bfa43c02f22b9d7f6c39/1606664100633/gimaxetededudamilun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5bcecb3e0f577146d424/1606376399411/thou_shalt_not_bear_false_witness_against_thy_neighbour_codycross.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_off0000c88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 5532 bytes
SHA-256: f207295a6ce003a1231010ec60b353d02b678e54add57c4a49e0ce557c27a9d5
font_01_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 11088 bytes
SHA-256: b2b4981d3e15bbe4b185682b436d1d34004adb7d4ffb1c1341b6faca97fde621
font_02_sfnt_off00010153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10153 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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