Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6ac63ee9720189…

MALICIOUS

PDF

77.7 KB Created: 2021-02-21 05:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ba689c2fdf97f24f9424909760503142 SHA-1: 99c024519f4fcbdf02c404ca808afda54033cae8 SHA-256: ad6ac63ee9720189466d9774950b836119bbea5587e85a165080485c6975d849
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document is designed to redirect users to numerous external URLs, potentially for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=motorguide+xi5+reviews PDF link annotation
    • http://apsmall.space/knight_leveling_guide_talonro4hesc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_600507954b88c.pdfIn PDF document text
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/rarixa.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/9hiCvge/41154471373.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/dhihg2C/snapseed_photo_editing_app_tutorial.pdfIn PDF document text
    • https://tabawowap.weebly.com/uploads/1/3/4/5/134599755/51ce6a7232a0c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458837/normal_5ff6826b3159a.pdfIn PDF document text
    • http://dlkmvkoenv.info/sql_server_management_studio_and_install4021m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5fe9ca7c3f9f9.pdfIn PDF document text
    • http://slampochka.ru/45263017204g15y8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387050/normal_5ff310c015f26.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/kuwimabodowiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385213/normal_60151dc9b6553.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/sugosubexez/13548434565.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/auditing_assurance_standards_icai.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/danny_gokey_give_me_jesus_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/filemaker_database_design_report_xml.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_off0000f64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 5100 bytes
SHA-256: d67e9ea6b1107ace38b8d080b421a769d5166dbe3496396696b352538b33f539
font_01_sfnt_off000107e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E4 9952 bytes
SHA-256: 5141a4dfe6129bca74b958f08180c345a7ab04284374c88156c117be9efffee8

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