Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e379c625406684…

MALICIOUS

PDF

73.7 KB Created: 2021-06-10 02:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 926e0231d3af89190433a9582ea752c8 SHA-1: c351d66dd3f95754003ce8ed17a17311a0e9d9e2 SHA-256: 71e379c625406684305c9ba27bb8e88d74d1ec2fbc71b78f81a9645b3f13e739
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm SEO spam or phishing campaigns. The primary URL, 'https://coretry.ru/pbw?utm_term=how+to+get+free+souls+in+mortal+kombat+mobile+2020', suggests a lure related to in-game currency. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://coretry.ru/pbw?utm_term=how+to+get+free+souls+in+mortal+kombat+mobile+2020
    • https://static.s123-cdn-static-d.com/uploads/4393020/normal_60b77cc789b2a.pdf
    • https://cdn-cms.f-static.net/uploads/4374704/normal_604460eabc141.pdf
    • https://xixezowipena.weebly.com/uploads/1/3/5/3/135341666/mexanezuwebijosez.pdf
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/046bd3dbc.pdf
    • https://tofeligekejogen.weebly.com/uploads/1/3/4/8/134873344/gegotamawak.pdf
    • https://cdn-cms.f-static.net/uploads/4459628/normal_605867658f910.pdf
    • https://cdn-cms.f-static.net/uploads/4465565/normal_60380ec14fd90.pdf
    • https://cdn-cms.f-static.net/uploads/4382618/normal_605f9694173e8.pdf
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5fd9d6a386b0e.pdf
    • https://simazilojimi.weebly.com/uploads/1/3/5/3/135345327/debibekumure_puzotena.pdf
    • https://cdn-cms.f-static.net/uploads/4404520/normal_6041f2a365dca.pdf
    • https://wivetagimogik.weebly.com/uploads/1/3/4/6/134618772/sevojuzidoburodanis.pdf
    • https://cdn-cms.f-static.net/uploads/4412573/normal_6014436d8058a.pdf
    • https://barigager.weebly.com/uploads/1/3/1/3/131398159/daxem-tugupuzafudod-fasik-rezofisemebikeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://josinibugaju.pbworks.com/f/how_to_get_free_coins_and_diamonds_on_cooking_fever.pdf
    • http://pamotekegopa.pbworks.com/f/energy_transformations_worksheet_answer_key.pdf
    • http://kifatozexi.pbworks.com/w/file/fetch/144998058/city_of_stars_score.pdf
    • http://barumena.pbworks.com/f/likuvotalepepopad.pdf
    • http://tukosifana.pbworks.com/w/file/fetch/144967752/vosowejumora.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_off0000e15e.bin
f81db141cb4939d6ba857edb94cbad417a84577daa16e5a847a82b1ffb6c3534		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 5620 bytes
font_01_sfnt_off0000f481.bin
d8cf1d26c229ba6a5240499376e6d64a3367168e5c7e53d2078a85e1beaf1800		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 10872 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.