Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ac004a75d09351…

MALICIOUS

PDF

71.8 KB Created: 2021-02-16 01:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a6ebfc224dd44278d08ab1af9dc8401e SHA-1: a7b2748e3308a6dd41d84c8a46126d8d1088a5e0 SHA-256: c9ac004a75d09351e3712a8d0294b3e98a96889a37efc0c92d7e38e88592b467
214 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 and routes users through malicious redirector infrastructure. 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-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/wix?keyword=recycling+triangle+number+4 In PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/fc6655ff87caf.pdfIn PDF document text
    • http://hhizmet.com/4147673115i0uyy.pdfIn PDF document text
    • http://mantenancie.com/javascript_animation_library_performanceqr1sv.pdfIn PDF document text
    • http://health-top.ru/82115212022hkxs4.pdfIn PDF document text
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/gebifosabururigi.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/tapexiw/acronis_master_image_creator.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/3266240721.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/emathinstruction_algebra_1_homework_answer_key.pdfIn PDF document text
    • http://fonajuwowo.epizy.com/zudewepiwamu.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/a_transition_to_advanced_mathematics_answers.pdfIn PDF document text
    • http://sajusujivolase.rf.gd/first_encyclopaedia_of_islam.pdfIn PDF document text
    • http://nuvafakidem.rf.gd/zagat_guide_paris.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/48027881177.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/83667389460.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/how_to_write_an_affidavit_for_bona_fide_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/bufilusimo.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/58798739798.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_off0000dd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD95 5276 bytes
SHA-256: 0ede8b10882522683af790148188e5398ee1ae0eaba82914bb6f4c66eeac2ce8
font_01_sfnt_off0000ef8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8B 10088 bytes
SHA-256: ba26c1cd5c99b28da07b820e15fadf2d9cbb6981119e42a78fff600ac034e482

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