Malicious PDF — malware analysis report

Static analysis result for SHA-256 539a55b29b9449dc…

MALICIOUS

PDF

76.7 KB Created: 2020-11-18 13:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f13285012df17ca32bccf4af1d1f7d95 SHA-1: 168dc5c9a85942e86e684a274e5d85b0b9286b67 SHA-256: 539a55b29b9449dc400a33a34b75dc0cfc9d29faefbbd06bfabcc6a020372b73
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'traffset.ru', suggests an attempt to redirect users to potentially harmful content or phishing sites. The ClamAV detection further supports its classification as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://traffset.ru/strik?utm_term=granny+outwitt+mod+menu+apk PDF link annotation
    • https://jejejawoberug.weebly.com/uploads/1/3/4/7/134768650/tarafotuguzitenobus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f890a147fc6e.pdfIn PDF document text
    • https://bozuzagon.weebly.com/uploads/1/3/4/6/134666742/9068671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5f8781a0256a4.pdfIn PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/velefuraladagaw.pdfIn PDF document text
    • https://mujugoseboli.weebly.com/uploads/1/3/4/3/134312554/fuxosatetuwajajukuja.pdfIn PDF document text
    • https://xesejiru.weebly.com/uploads/1/3/4/7/134716288/konepixekuf_pudimaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taguxif/symbols_accepted_in_league_of_legends_name.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/xiro_xplorer_v_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/infinity_gauntlet_mod_for_mcpe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945151a5-8e2e-4d9d-9769-1abb1d3245e1/oshkosh_high_school_shooting.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/codehs_javascript_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5596def0-9816-4af2-bd91-022cbdda682a/pobatoxojerev.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/96056000314.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/ti_84_plus_graphing_calculator_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e4a333-750d-4a3f-b64e-fd15c97be573/andrew_gelman_bayesian_data_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/71420985004.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 5184 bytes
SHA-256: 78777ea20c643caeb8ce623e56b759d1acb602006ae753c4b1c9c8383d726478
font_01_sfnt_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 2304 bytes
SHA-256: 74dbeb26eb6ebbd037ba0998b948b5e20c9274a3d5a47aa8adae196881ce1d64
font_02_sfnt_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 11756 bytes
SHA-256: cee19bc8f19cff055569d2f7cd11b79a3c83f4b516a2be0031d3005332c85ed3
font_03_sfnt_off0001100c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100C 16180 bytes
SHA-256: f2d1376d85d8d670bd905bfa08599dddd2c58839d79ffe91403443a6d5bcb457

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