Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec62fb2c24f295b3…

MALICIOUS

PDF

79.9 KB Created: 2021-02-16 05:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 61d59ec402ebb33e5ea719a8a073ff0f SHA-1: 3c0477acf94c92aa1cba77823c606fc6da761317 SHA-256: ec62fb2c24f295b3aaed124ed596554021281626fc1763ea2e92379c43efbd4b
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://baarspo.ru/123?utm_term=club+dead+game PDF link annotation
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/f3e81c61188b2.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/CNhgihq/tasevasasapitosuputexu.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/iflAbTN/hallmark_tv_when_calls_the_heart.pdfIn PDF document text
    • https://potigaguw.weebly.com/uploads/1/3/0/9/130969810/22dc95c5d137c7a.pdfIn PDF document text
    • https://cdn.sqhk.co/jurunuxetal/DKCge8y/37983757998.pdfIn PDF document text
    • https://cdn.sqhk.co/xikokopek/gdAhqgh/sheltered_definition_literature.pdfIn PDF document text
    • https://xuvasilibozin.weebly.com/uploads/1/3/5/3/135335949/vuwawibetoxolo.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/wefurolereziz.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/kujesulad/mobimobojimolak.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/54729525799.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/al_quran_sinhala.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/99717224930.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/80118006501.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/daxuguzemin.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/88004498203.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/loyalist_or_patriot_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/gst_calculator_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/mewuwudisitoxidotubafose.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/wallpaper_for_android_phone_anime.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/pujuruvamabusivejakoxemog.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_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 4916 bytes
SHA-256: 0047a1a297e68a72fe4a163555147e4fdd3ed21166cb92d0e517dbeb1e30e54a
font_01_sfnt_off00010e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5B 10592 bytes
SHA-256: dbc3ffb7ab9e79c45eba7106a0cd6bb38bd7884385d9a8d0df4ae05f1d47a2ef

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