Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fbc9f33e337116…

MALICIOUS

PDF

74.5 KB Created: 2021-02-12 06:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c921ee0f75740ee063fb45c9f4719449 SHA-1: 524117f13385673b69a3bd5f7c2c43d95be7ee2a SHA-256: 08fbc9f33e3371160f61ab42979c985ed41407a8d20004fa9091a72a4065c74b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious or SEO-abused domains. Heuristics indicate it's a malicious redirector and part of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=june%202015%20algebra%201%20regents%20answers%20jmap In PDF document text
    • http://generatorsale.ru/15398771258f9s7.pdfIn PDF document text
    • http://priz24.site/74914398850lis8o.pdfIn PDF document text
    • http://pomirkapa.site/fapagofezixaxexoxomenudsskn.pdfIn PDF document text
    • http://autobaff.xyz/ms_word_table_cell_colour3vmaw.pdfIn PDF document text
    • https://zeloseko.weebly.com/uploads/1/3/1/1/131163733/ac6f1.pdfIn PDF document text
    • http://hookup750.website/the_lost_honor_of_katharina_blumyrxar.pdfIn PDF document text
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/zozozodijiwebeg.pdfIn PDF document text
    • http://geesecam.com/star_wars_sheet_music_alto_saxokwkf.pdfIn PDF document text
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/kisemokudusimivejop.pdfIn PDF document text
    • http://ottics.ru/playboy_collectors_association_playboy_magazine_price_guideqrzfu.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/laradusa/vivah_all_song_pagalworld.pdfIn PDF document text
    • http://diwukimip.epizy.com/gupazisolotakirumevamef.pdfIn PDF document text
    • http://jekidosokun.epizy.com/algebra_1_and_2_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/china_visa_application_form_for_indian_passport.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/ashokan_farewell_orchestra_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/40516681639.pdfIn PDF document text
    • http://lesizemub.epizy.com/32352626188.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_off0000e3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 5888 bytes
SHA-256: 0b5b1e1862591b564a28779bf0fc42a85fc01b60fe541f6d50b3b2b35489053c
font_01_sfnt_off0000f7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D7 10988 bytes
SHA-256: 568d8bf7751d5b1fb69597900813ecf1cba6cb222cfd3a7517d067b98dcc90a3

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