Malicious PDF — malware analysis report

Static analysis result for SHA-256 22041b3b6df5bc22…

MALICIOUS

PDF

87.1 KB Created: 2021-05-05 11:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a5f59815dd55438fc60f342071a17598 SHA-1: 55ea5122f1a1a763a72cdbc7570f8b6a03583d9c SHA-256: 22041b3b6df5bc224ec843d4a3ccc9d5ae4ed9fd84dfb754481970e5903816c4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://kuzutuzo.ru/strik?utm_term=cyberpunk+2077+is+the+best+game+ever+made PDF link annotation
    • http://sapivopulabugap.iblogger.org/35178554429.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/29f2047fdba76a.pdfIn PDF document text
    • https://zumezotuxo.weebly.com/uploads/1/3/4/3/134332991/f6905e769d.pdfIn PDF document text
    • http://weladorizifir.iblogger.org/78827869648.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/b0758aa3d.pdfIn PDF document text
    • https://konozobit.weebly.com/uploads/1/3/4/4/134456152/0fcce903cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://melufisagaw.epizy.com/vidmate_video_er_install_now.pdfIn PDF document text
    • http://pimorem.epizy.com/cowboy_bebop_clarinet_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b992e7-8121-4ad6-9dc2-4aeb97a89d6a/pupisilapekulamovat.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/8677734797.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/22731155770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13e8757-89f0-4e68-a5db-b7ff5ee42ae6/how_to_determine_prevailing_wage_for_h1b.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/27506511254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2b6e97-7f95-4443-8c04-7cc820527c4b/fomegamidotesupewutegox.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/20482551466.pdfIn PDF document text
    • http://bekonoxidolu.rf.gd/fawitizokekegezomubuvani.pdfIn PDF document text
    • http://wozawexopad.epizy.com/castillos_de_carton_almudena_grandes_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/dositonenojajoteruz.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/xejaterixobiwu.pdfIn PDF document text
    • http://kosigasarem.epizy.com/gebexusi.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_off00011268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11268 5968 bytes
SHA-256: 8b786951117cdb62cf71e715fe843e00f088c6077d9ab01aa7e6a71110c07c54
font_01_sfnt_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 11924 bytes
SHA-256: 4963b38faf692e806ec936a50ec0d7e95a02c3195e1253682a38af378b7cf839

Open this report in the interactive analyzer, or submit your own file for analysis.