Malicious PDF — malware analysis report

Static analysis result for SHA-256 d175e673a3312099…

MALICIOUS

PDF

82.6 KB Created: 2021-02-28 20:17:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76a6e1a8b2153e6ab66e6a0304345cf9 SHA-1: d416cdfa5fba7bcc11b296dc070c4362dada3c7c SHA-256: d175e673a3312099d2c796171c6efa2d5fad1b8bac3b9a1542d705b6535f835a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The primary attack pattern involves a link farm with numerous external URLs, likely intended to redirect users to malicious sites or for SEO manipulation. The document's structure and embedded links suggest it's part of a phishing campaign, possibly delivered as a spearphishing attachment.

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://ponafet.ru/123?utm_term=40+book+challenge+pdf
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/38cda34da4.pdf
    • https://cdn.sqhk.co/tefozakozup/jdhbdy0/strange_super_heroes_vs_villains_3.pdf
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/gasokufeborisu.pdf
    • https://dojobojijiwum.weebly.com/uploads/1/3/2/6/132681334/kusuvisovuwovoxidu.pdf
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/1470436.pdf
    • http://lobabinuladeri.medianewsonline.com/87562677684.pdf
    • https://minizejemeroro.weebly.com/uploads/1/3/2/7/132740725/kuruxupotobuwezul.pdf
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/damidal-jipikik-zozumir.pdf
    • https://wowimenus.weebly.com/uploads/1/3/4/7/134709331/1927908.pdf
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/4986823.pdf
    • https://dosisusibifoba.weebly.com/uploads/1/3/4/2/134236234/5716536.pdf
    • https://cdn.sqhk.co/verexoleki/gjvJigM/14603063292.pdf
    • http://pawomodom.medianewsonline.com/31856434858.pdf
    • https://cdn.sqhk.co/rorajakura/ajieTDJ/spaceballs_trailer_espanol.pdf
    • https://cdn.sqhk.co/nixibaraje/geS00hb/flights_to_vegas_from_dallas_american_airlines.pdf
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/bc36a.pdf
    • https://cdn.sqhk.co/xamowizaso/vjhkaYh/copper_price_per_tonne_aud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://namepafubi.atwebpages.com/kung_fu_hustle_2004_hindi_dubbed_full_movie_download_300mb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50b.bin
fe0f17aca2127258774984c81821a60f8a366abcd73e9744442a29b46bfceda8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 5140 bytes
font_01_sfnt_off00010666.bin
d3d116da8fd8f9269b1b74bf651831c11492968019f8d0a2a886a15b33b1baea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 11892 bytes
font_02_sfnt_off00012eec.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEC 4324 bytes

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