Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e48e7ce5efffae…

MALICIOUS

PDF

68.4 KB Created: 2020-12-17 21:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ebde87b017cad540e7f08007ad7bd6f8 SHA-1: d027856cdaee05e40ca2f92d0628b71fd80f3d42 SHA-256: 89e48e7ce5efffaeaf12f139401dc5473e76cb99acbdde6b458cf86a3db4e879
214 Risk Score

Malware Insights

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

This PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://traffmen.ru/strik?utm_term=the+lost+ways+guide+book+hardcover'. The document body, though heavily obfuscated, suggests a lure related to a 'guide book'. The presence of numerous external links, many pointing to PDF files hosted on various platforms, indicates a sophisticated redirection scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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://traffmen.ru/strik?utm_term=the+lost+ways+guide+book+hardcover In PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/vovakep.pdfIn PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/puguj_tilopupowuxogu_puxidoxepemi.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/3e116d7.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/5437937.pdfIn PDF document text
    • https://denofunafefu.weebly.com/uploads/1/3/4/7/134750316/forizovux.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/756584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0bc8a7848ba205d17b7b8/t/5fc73074788a962b7c2a4bfd/1606889590148/romubobobiraxube.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/41985235570.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/83803875162.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/succeeding_in_early_us_history_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/awesome_god_rich_mullins.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/4041341039.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54c636609fd0ee7ae99b9/t/5fd636b20f11661d4c25e363/1607874226646/android_tv_and_smart_tv_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/lededodarovutoketuse.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_off0000ce30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE30 5608 bytes
SHA-256: bca81dcecd68344b149d9cecbe9231903d52d11c2bcc6e30274752393da0915b
font_01_sfnt_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 10488 bytes
SHA-256: 8dc459a1f59379ea02f603b87ce69a798379314d7f8df0799351754818dd125e

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