Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe621b805294fb5…

MALICIOUS

PDF

72.5 KB Created: 2020-12-09 23:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ee12c285ad6adacfeaaa35233fecfc0b SHA-1: d8c7847040c3c09ebcf1403ad7aa54c23b3fd9a6 SHA-256: fbe621b805294fb501194655b60d4bf5963aaf3f142b8507c625ad99f0d1e55c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=tap+titans+mod+apk+unlimited+diamonds PDF link annotation
    • https://pewixuzapama.weebly.com/uploads/1/3/4/6/134655392/7342879.pdfIn PDF document text
    • https://malebikixolu.weebly.com/uploads/1/3/4/3/134358595/vosemotako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0d7ac403f5353fd956fc5/t/5fc61933eaf37e3b646ccb53/1606818101377/medieval_2_total_war_mods_stainless_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/tv_guide_savannah.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/how_to_teleport_to_coordinates_in_minecraft_education_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57c39d7936484085380d/1606375364840/gojetorukesodego.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe40041972c46e3c6aff55/1606303748964/g41t_ad_v1_0_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/structure_of_acetone_and_formalin.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/love_lockdown_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/44597906515.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/66736150161.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/chromatograms_in_bioinformatics.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/xuridamom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 4904 bytes
SHA-256: d1d85872dc312a99627952055edc5dcccdf776fb51b721827e10a90f715d87ce
font_01_sfnt_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 10404 bytes
SHA-256: 41462f2ff803ccfc8dde6109b0286ad25c8808945dac81d3274f0ce3dbc988e9
font_02_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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