Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1da8f68a0bfdead…

MALICIOUS

PDF

87.2 KB Created: 2021-05-02 08:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16268b127e4bc2abde8cdbcbf4295ef0 SHA-1: 7fb1ad9dff7c2a33bf6c0071c1cfa033cfd1f966 SHA-256: a1da8f68a0bfdead549f763ff25036600d30b85de549e24310d72e6e0988bf05
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=high+protein+non+veg+food+in+india
    • http://bcpzonasegura10beta-viabcp.com/how_download_a_cellphone_ringtonesf0gm.pdf
    • http://cosmostil.top/modern_sofa_set_designs_for_living_room03h3v.pdf
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6036b00f6f1bc.pdf
    • https://cdn-cms.f-static.net/uploads/4485310/normal_60683e5394bdb.pdf
    • http://hdvideo.design/how_do_i_reset_my_binatone_phones9c7x.pdf
    • http://stavki-na-sport.site/supply_chain_management_chopra_7th_efuf48.pdf
    • http://ita-bio.space/xivunijeribevebafogigipliwvg.pdf
    • https://static.s123-cdn-static.com/uploads/4385852/normal_5fdd2fe149fcf.pdf
    • http://nakrutkavk.site/freedom_of_speech_essay_analysis_questions_answerszoi2m.pdf
    • http://mixit.info/rowenta_focus_iron_dw5183_manual218ty.pdf
    • http://chebsvet.ru/combatives_level_1_certificate1ltfr.pdf
    • http://ulekschool.online/37326541270d3gf8.pdf
    • http://scoretdho.best/differences_between_eastern_and_western_religionsktpw7.pdf
    • http://respect-ltd.su/mini_borescope_for_androidjzw3i.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/julexekubaj/average_salary_of_ethical_hacker_in_canada.pdf
    • https://s3.amazonaws.com/genukopapovixo/what_is_the_summary_of_the_book_animal_farm.pdf
    • https://s3.amazonaws.com/fodose/safoma.pdf
    • https://s3.amazonaws.com/rizoli/vcenter_client_5._5.pdf
    • https://s3.amazonaws.com/jajuzasalikirut/nasofozul.pdf
    • https://s3.amazonaws.com/zesixefe/57008916109.pdf
    • https://s3.amazonaws.com/sevoga/nefalovaxepunuxatijekivi.pdf
    • https://s3.amazonaws.com/nijosinizo/91737894444.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001190f.bin
3904bdf4c8bd139b66e21f21cac5916851a41a92577f0ea1fedf0ae6ee94b164
pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 5116 bytes
font_01_sfnt_off00012a7d.bin
34e5d42e2ab5d0b36101b88adaba593be402dc9948abc95c2c2fb046698eaa32
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7D 10764 bytes