Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bbdc791a9f0d50…

MALICIOUS

PDF

81.6 KB Created: 2021-03-05 14:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ef55e752dc75eae119ea2cf5e8b2bb15 SHA-1: e24fb5b3394dbd0c4e31c650229e36a15d31b320 SHA-256: 69bbdc791a9f0d505fdc52c478d718720a1d7cb8cbd4e893a65709aaa9ee61d0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure users to external content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/strik?utm_term=tacky+the+penguin+printables PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fd7bb71aa160.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417222/normal_5ffb4d5fe494f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_5fd91c8f65a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fe74f16e0afc.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/ha3giE8/chess_titans_free_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jeqLhiI/wizard_of_oz_witch_under_house.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375504/normal_5fcc23547acfb.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/Xigivja/pelowukajotivoxif.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/jnjgEXO/dinoland_cafe_myrtle_beach.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://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_f705fa3518764462a305fe57786b0443.pdf?index=trueIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_ef086c4399604be3858cc5127516722c.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_5dcf2bb99f30494ea94b131604f986b1.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_f2f97a1b69194618bf0a1cbc6ff94efe.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_a27d0d3e9e404a1d947ff2e126641af2.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_a0df50318fba40cdab696d300d99fa1e.pdf?index=trueIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_b4e3d60d47ec42d79bf23750fc971d5d.pdf?index=trueIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_29964731a263447a985131881a5ef8bf.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_c19c57c91e374abe8adfba3e6e5c2db1.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_a7a58fe8fc8440a49fe056e2cdd07a58.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_2eff8cdde9454c268f539c2faf54d0d7.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_b87dfe129b9a4c0d816383bc2dbec0ef.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_bedf8c6065ef43c2b67fc28638cd6647.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_eca6341176d04ed48153d2bd945dd85a.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_6e367312e40d42728f1cc684fdf6c421.pdf?index=trueIn 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_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 5220 bytes
SHA-256: beade2e3936184c7dc40fe0e28708cd61eb3c9b7db3da43808fc8c83ea7efe44
font_01_sfnt_off00010563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 11024 bytes
SHA-256: f5d98e2540fb028fe5ad3dc693307ab5d97d6b3e2e218f040431dd901c1c2d2c
font_02_sfnt_off00012a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A81 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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