Malicious PDF — malware analysis report

Static analysis result for SHA-256 754d2fd155b69dba…

MALICIOUS

PDF

68.6 KB Created: 2021-01-06 04:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad61ca8a478a6e560c309b7fd44fed78 SHA-1: 152469256fd1e3d7303350f072c4b98385ec5882 SHA-256: 754d2fd155b69dbad2c757987070b1e7a9543df460fa90ca761c3960abd997fa
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the document contains a large number of external links, likely to facilitate phishing or malware distribution. One of the embedded URLs, 'https://traffking.ru/123?utm_term=boone+the+bounty+hunter', suggests a lure related to the 'Boone the bounty hunter' theme found in the document body. Although no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=boone+the+bounty+hunter
    • https://sukorajonivo.weebly.com/uploads/1/3/4/1/134108587/defafuzaz.pdf
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/3167795.pdf
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/kenosotelun.pdf
    • https://cdn-cms.f-static.net/uploads/4409239/normal_5fb280092db19.pdf
    • https://cdn-cms.f-static.net/uploads/4491686/normal_5fdb36825ba19.pdf
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fed437c290af.pdf
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/ce0cb2b.pdf
    • https://static.s123-cdn-static.com/uploads/4418783/normal_5fccf6e30dc2b.pdf
    • https://cdn-cms.f-static.net/uploads/4404103/normal_5f91dcaf5d94c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kovezodepugov/sijatelosakoz.pdf
    • https://s3.amazonaws.com/felasorarabipis/fujobutepeb.pdf
    • https://s3.amazonaws.com/zowejunef/crossword_answer_for_unsuitable_name.pdf
    • https://s3.amazonaws.com/xefezesebusu/buscar_mi_android_con_google_maps.pdf
    • https://s3.amazonaws.com/vutame/zktime_5._0_attendance_management_software_free.pdf
    • https://s3.amazonaws.com/muvojugejoxip/rumubexalopibigoj.pdf
    • https://s3.amazonaws.com/kukazowox/30915255720.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bab4.bin
7486bb6cfa40b832c3fa8413ba5eea7fde2609cd7e134c4bd216cd15c408b17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB4 4644 bytes
font_01_sfnt_off0000ca85.bin
8fbe0eab7e9f4e839c008339a8a545db0f3c7602218b8fef67f3fb96e6dab794		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 10644 bytes
font_02_sfnt_off0000ee61.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 16204 bytes

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