Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6247f81b942e6e…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 12:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 91ed1887f44345d49a4393d8d1d1ffc6 SHA-1: 328c6e850f0e4a8f86f9830213cbd70c98ba49f4 SHA-256: 2f6247f81b942e6e7df6d43e699ae9425d8a38d5286d9d639b2a1cd5efdc3b4d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though partially corrupted, suggests a lure related to a 'free pdf' download. The presence of external URIs and the ML classification strongly indicate malicious intent, likely for phishing or distributing further malware.

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
  • 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://maypoin.ru/wix?keyword=the+simple+path+to+wealth+free+pdf PDF link annotation
    • https://cdn.sqhk.co/karapazepot/jhxgfjc/puzzle_box_game_solution_level_36.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/Sjhgfgf/34092642103.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/OhfhibL/super_pixel_heroes_download.pdfIn PDF document text
    • https://suxavumopej.weebly.com/uploads/1/3/3/9/133999634/povabotoni.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/khfwcEp/health_tracker_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/hjqihbq/hip_hop_music_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/hhT8qEA/16264601038.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/cKjfFhB/the_art_of_public_strategy.pdfIn PDF document text
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/2636616368.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/daA1eic/rosesikozavudag.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/nijudow/refadumedosew.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/98510080611.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/2018_cadillac_xt5_luxury_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/zuxefokive.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/24661415636.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_off0000dd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD65 5324 bytes
SHA-256: e2fa0e3e2ea917e0f817bab89e89190469476ed911b90990961ebcf0728ec3af
font_01_sfnt_off0000ef61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF61 10672 bytes
SHA-256: 9c98aeb9b0baacd14ba3f3d18f63ca702b18bd70a434eb1d8164c0975ffa409a

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