Malicious PDF — malware analysis report

Static analysis result for SHA-256 4497262be14c1761…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 18:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8805878286385e0f9f79559c8abc4721 SHA-1: f650cc261b822c5fb3541f40cbd9e0c38082fca1 SHA-256: 4497262be14c17612f6d9f9a0a2929686f0cdb994ba14216112601b963796758
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. It contains a significant number of external links, with a primary focus on 'https://lozipotod.ru/wix?keyword=kinh+l%25E1%25BA%25A1y+cha+h%25E1%25BB%25AFu', suggesting a phishing or SEO spam campaign. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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://lozipotod.ru/wix?keyword=kinh+l%25E1%25BA%25A1y+cha+h%25E1%25BA%25B1ng+h%25E1%25BB%25AFu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413707/normal_5ff3c43b23718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_603f1a0748cf7.pdfIn PDF document text
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/2708c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464083/normal_603a5b5c05211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414867/normal_5ff7b8515b89d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fc90d2d7413e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_604bbc7aa12e6.pdfIn PDF document text
    • https://tapalezigoluv.weebly.com/uploads/1/3/4/3/134305255/fbb4a79dc2dab1.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/10940234961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376126/normal_5fe0235ac9053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fe220652a9e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_603d7317249a2.pdfIn PDF document text
    • https://ruginimurixibiz.weebly.com/uploads/1/3/1/6/131606491/wipukolimovexo.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/fdc0dd1113430a9.pdfIn PDF document text
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/xukitajolafedes.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/supefujoxopubu/eva_luna_telenovela_capitulo_110.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/carryon_my_wayward_son_supernatural_musical_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/sinusoidal_functions_as_mathematical_models_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/ultras_game_mod_apk_apptoko.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/how_to_balance_chemical_equations_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/ccna_200-_125_exam_format.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/can_i_fish_without_a_license_right_now.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/duxutajosalobezefera.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/72486359233.pdfIn PDF document text
    • http://novupomajanox.atwebpages.com/berliner_platz_3_neu_intensivtrainer_lsungen.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/mofigedebewubidebe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5612 bytes
SHA-256: 8595837984fb5604b81a82cc9eb6574927b2b07d11c3507eaf258f2449247cab
font_01_sfnt_off0000fb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB44 22972 bytes
SHA-256: fa1e7ff4b8b637a03b05db9b3baaea3b282b9e86b3badda55fb2aabc5f6322d8

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