Malicious PDF — malware analysis report

Static analysis result for SHA-256 af267682280d6e01…

MALICIOUS

PDF

118.8 KB Created: 2021-06-11 09:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14bad3c595072c1586f6078095c88639 SHA-1: e5ba55236223a85c3791eda772c005eb5f058fb0 SHA-256: af267682280d6e011b5dd16b3e1951eea2c8c0122a23afb9b63f86a54ee41e3e
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, and a ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs, such as https://pelibifir.ru/123, suggest a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains text related to police reports, likely a lure. No scripts were extracted, but the PDF structure itself facilitates the malicious linking.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/123?utm_term=first+information+report+rajasthan+police
    • https://cdn-cms.f-static.net/uploads/4446388/normal_5fe880ac20cee.pdf
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/witunulili.pdf
    • https://cdn-cms.f-static.net/uploads/4454167/normal_60111f2c540d2.pdf
    • https://cdn-cms.f-static.net/uploads/4382952/normal_6021a9629cd39.pdf
    • https://cdn-cms.f-static.net/uploads/4426823/normal_5fd1fb7d71feb.pdf
    • https://cdn-cms.f-static.net/uploads/4421210/normal_601f710acdd35.pdf
    • https://cdn-cms.f-static.net/uploads/4427783/normal_60252b82cf295.pdf
    • https://nugakiru.weebly.com/uploads/1/3/6/0/136050310/393b5b8.pdf
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/ripokezuvekutisuw.pdf
    • https://panebelodoz.weebly.com/uploads/1/3/4/6/134619461/monagoru.pdf
    • https://cdn-cms.f-static.net/uploads/4486778/normal_604cd222ac57b.pdf
    • https://xusuzipurojovup.weebly.com/uploads/1/3/4/3/134325257/fajizenupo_filawaz_bofiriza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mitamugukojo.pbworks.com/f/vekelob.pdf
    • http://vifogajo.pbworks.com/w/file/fetch/144499122/solucion_escape_game_50_rooms_2_level_6.pdf
    • http://gitefov.pbworks.com/f/the_weeknd_beauty_behind_the_madness_vinyl_yellow.pdf
    • http://sofutikajen.pbworks.com/f/the_history_of_the_ancient_world_bauer.pdf
    • http://ruzezotep.pbworks.com/w/file/fetch/144994953/sumulalijezazelujege.pdf
    • http://garifukedako.pbworks.com/w/file/fetch/144896703/waragudofanuguma.pdf
    • http://varulemenel.pbworks.com/f/kabir_singh_songs_downloadming.com.pdf
    • http://supatibu.pbworks.com/w/file/fetch/144654351/iptv_android_box_strong_srt_2022.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197c6.bin
d47f601a1733ebce9a0b5373ba93d5f972f5e79fd6a66652aa1db9c915440577		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197C6 5288 bytes
font_01_sfnt_off0001a99d.bin
055d3bcfaf29f1e19f483d8d27287eb8c501d36518dcbd161bcfb0b049fa3c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A99D 10464 bytes

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