Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a8a5fddb95fa24…

MALICIOUS

PDF

72.7 KB Created: 2021-03-16 20:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33425a1bd29ec18b5fc93a7fc3372af5 SHA-1: ba912ecec03e4ad88ee598315d5bb37e0f53a5da SHA-256: 45a8a5fddb95fa2418259130b7cad52c384781809c374a317df9a9c9b4fb316c
164 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 phishing or trojan threat. It contains numerous external links, many of which point to PDF files hosted on suspicious domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains a reference to 'real steel full movie mp4', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=real+steel+full+movie+mp4
    • https://cdn.sqhk.co/xaripisi/gdziaie/94009581834.pdf
    • https://cdn.sqhk.co/suxepemup/igjhifv/43124868010.pdf
    • https://cdn.sqhk.co/lowixadoges/chcojfC/85015505357.pdf
    • https://cdn.sqhk.co/rogekanus/LDjjdgd/26705758221.pdf
    • https://cdn.sqhk.co/fuwasokeg/hbjc3e4/snake_worm_zone_2_io.pdf
    • https://cdn.sqhk.co/rixutixim/Uoidq2c/papa_pear_saga_app_store.pdf
    • https://cdn.sqhk.co/dejijadu/hjhjhan/46336886782.pdf
    • https://cdn-cms.f-static.net/uploads/4488103/normal_5fdbc2b318c80.pdf
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/3812370.pdf
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/1220006.pdf
    • https://cdn.sqhk.co/tamoravuwera/gcuja6n/mozapefuxinafi.pdf
    • https://cdn-cms.f-static.net/uploads/4481515/normal_60240e03b7d91.pdf
    • https://lukajupuxeburi.weebly.com/uploads/1/3/4/6/134630189/111214.pdf
    • https://mijujatojiso.weebly.com/uploads/1/3/4/7/134701577/zuxeg.pdf
    • https://cdn.sqhk.co/pavetikedur/gfZ1jdK/zbrush_hair_sculpting_tutorial.pdf
    • https://cdn.sqhk.co/tiwumixe/ievghHT/box_office_collection_2020_worldwide.pdf
    • https://cdn.sqhk.co/fedovipawe/tTcievc/human_resource_management_degree_requirements.pdf
    • https://cdn.sqhk.co/ropikenetu/jxdjd2J/beseluxomebovixa.pdf
    • https://cdn.sqhk.co/motanunika/igjeziu/super_junior_star_collection_card.pdf
    • https://cdn.sqhk.co/devisojop/eiggijd/36762183594.pdf
    • https://cdn.sqhk.co/devisojop/ibPhb3F/mobepaz.pdf
    • https://rudiwiguxovo.weebly.com/uploads/1/3/5/3/135317070/6734240.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tedowafomaru/70073815471.pdf
    • https://s3.amazonaws.com/minabiwa/nemipenuzu.pdf
    • https://s3.amazonaws.com/tufitijinexu/45846661759.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_off0000de11.bin
34e78527bec592d8aaa90825a61d1d79c5adcc65df5af691046589d617121f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE11 5108 bytes
font_01_sfnt_off0000ef78.bin
059d093a9abd983cedaa8191c73c26f3d14c166b8c4f7a5d85e7ca5b7aab8f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 11064 bytes

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