Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a6b8d4b717f38e…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 19:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7f25b083da66aa35d173c6f968a718f6 SHA-1: dd7452d8d06b1f3eb2f842c82c9a4b83376b8f1c SHA-256: 62a6b8d4b717f38e0dcbb386bd87d37793acd3ea1355fa0d4a6e7f2bd81c43a0
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 0.9998

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://bologen.ru/aws?utm_term=masters+in+cell+and+molecular+biology+salary PDF link annotation
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/xaxozuk.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/zavemamodorarivojuvu.pdfIn PDF document text
    • http://luzepusi.iblogger.org/juwufax.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/1786865.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
    • http://madepuz.epizy.com/how_to_connect_soundpeats_q12.pdfIn PDF document text
    • http://fefomuk.epizy.com/dinowokewoniwageked.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_e6580f3f3d5f4b7186601873c5b82ebb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/counter_strike_1._3_pc_game_free.pdfIn PDF document text
    • http://pofazutufugu.epizy.com/95746237109.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/chale_aana_status_female_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/valkyrie_drive_bhikkhuni_achievement_guide.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_35875c8b48c34967b5c588369dd946e3.pdf?index=trueIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_d3f0ff763e4449d5ace19ea2f7ee6c9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/big_nate_wikipedia.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/product_costing_and_pricing_system.pdfIn PDF document text
    • http://vajekalisafemun.rf.gd/electronic_diversity_visa_lottery_2020_application_form.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_28ac7fe3057c4b7a8603d91eccbd3993.pdf?index=trueIn PDF document text
    • http://xikisefux.epizy.com/xawuligib.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_off0000e6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FB 5388 bytes
SHA-256: 90f7b9507e761d170afff0621441decfed8b7915ad93e76746d7baadd6912f03
font_01_sfnt_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 10616 bytes
SHA-256: 87a22b439c53e63069036c88597d08a09d4cd1354b63e5ef86d540e5b242fe58
font_02_sfnt_off00011d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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