Malicious PDF — malware analysis report

Static analysis result for SHA-256 baaf2ce3e62ba055…

MALICIOUS

PDF

81.3 KB Created: 2021-05-13 22:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2458c932d9388edff244b5052f41c1cf SHA-1: a527a7fd662b045dbacfb14c1729a54ed4e05758 SHA-256: baaf2ce3e62ba0556514d8a3cb08a6c87a28d43953585d3cbdf12cef05e8b2c3
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to a domain associated with malicious activity, specifically a lure related to cleaning a dryer lint trap. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable hosting, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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=how+to+clean+bosch+dryer+lint+trap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5fd9939d7dc72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_6019e064c8270.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/gjPShe3/580343572.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374688/normal_5ffa4fd22bb79.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/ijKd7Rj/2390059296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455185/normal_5ffe8fe20fb6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_6063015ab8469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_6058cc506f668.pdfIn PDF document text
    • https://jixisejilikabow.weebly.com/uploads/1/3/4/2/134265892/vavavapejegirafi.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/1e8e7292.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/SifiPjc/super_karts_wildwood.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/hbrij4z/fipafaxit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462065/normal_605666628d105.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/hfMnhcg/the_dark_pursuer_apk_mod_multiplayer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_6b06d3be4c2e457fab328df0d7abb55f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/navinopidew.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/sanugaxivozidetiwiju.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_a2646b10d0104a4c8c9d00e66283e204.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nijudow/free_microsoft_borders_templates.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_7e99c9ba6b9f4c07a97c015b7aa7f74b.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_20e5f556217941389a0216ff99562d35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bagokiko/11649149745.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_fe7c38759ccf49da85058c6682413b17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/volume_of_prisms_and_cylinders_powerpoint_tes.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 5456 bytes
SHA-256: 720e844ce376486fcd3fa89b7720dbace7ccac6747aa49d30970de0bfeb155de
font_01_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 10952 bytes
SHA-256: cc309d04a46418c4650bcae9603ff9aa036fbf9e79f86cfd8afb65c5c2b738d0
font_02_sfnt_off00012237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12237 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449