Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d74002173a88c6a…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 19:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 36d69fbb9b39dcae815d636984ad93fb SHA-1: a5d764e818a1c3ae2e884032abd2a826daa1152d SHA-256: 8d74002173a88c6a4e36d2183416d28569b70bd8ddb2f529c4c0ac74ba69fd86
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and CDNs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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
  • 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://druttle.ru/strik?utm_term=what+is+black%2527s+law PDF link annotation
    • https://cdn.sqhk.co/fofateze/gig3ihv/15282364085.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/xgg9hjG/strikers_1945_3_mod_apk_unlimited_ruby.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/wjbIhii/wogekuwurazuzofuzad.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/1khjttq/53211297999.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/hagcBji/feregimugu.pdfIn PDF document text
    • https://nixixope.weebly.com/uploads/1/3/0/8/130874324/d61feb1d3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/gz5bRif/taxuno.pdfIn PDF document text
    • https://cdn.sqhk.co/vonixilavot/FsUggjb/pukijupifebilawiki.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/hbidhfZ/tafsir_mimpi_buang_air_besar_di_sungai_togel.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/gawabog/2004_yamaha_banshee_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/xoxonowetupezewagubij.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/c_programming_language_full_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/fodesifazonod.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/mojapejewowurowomabaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/babuji_zara_dheere_chalna_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/die_bergretter_zdf_episodenguide.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/pink_panther_trombone_sheet_music_easy.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_off0000dad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD9 5132 bytes
SHA-256: 2c8d79d52e30900fca539b0c2fb900bfca7ec524e1bb8df3ead7e6c6a9d68058
font_01_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 10324 bytes
SHA-256: 831998c486caa796738aedd96b5951355f2fa058891e518f5e491e15b58c9584

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