Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86d900467dd114f…

MALICIOUS

PDF

80.6 KB Created: 2021-04-02 15:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c030c4aa4ee51ef30fc2a49beb5730f SHA-1: cebdb7baaa4fbedc5b3b616a9847348b8eb9838c SHA-256: f86d900467dd114fa127b4e202559f455f93c069538f06a5ea866273b48790ac
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, indicating a potential link farm or phishing attempt. The primary URL observed is 'https://druttle.ru/wix?keyword=how+does+government+affect+our+lives', which suggests a lure related to government influence. No scripts were extracted, but the PDF structure itself facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=how+does+government+affect+our+lives
    • https://rafutukeri.weebly.com/uploads/1/3/1/4/131453201/777074.pdf
    • https://cdn.sqhk.co/xufojidaju/KqjdS8k/26256581978.pdf
    • https://cdn.sqhk.co/xufuwejaxe/iggc4if/81623624527.pdf
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdf
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/0ca497.pdf
    • https://xogegexisupu.weebly.com/uploads/1/3/4/3/134319275/5687793.pdf
    • https://cdn.sqhk.co/jojikoxazew/jRSzbSk/fijiwukisuluxivataso.pdf
    • https://cdn.sqhk.co/kosojilufut/d0gdqib/pikarusupaperuzivika.pdf
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/lezabuxupazepezupomi.pdf
    • https://sixobeludid.weebly.com/uploads/1/3/5/2/135298518/rewutosovudoz.pdf
    • https://cdn.sqhk.co/mozulunilex/zhip0jf/40534732992.pdf
    • https://cdn.sqhk.co/wogefosa/ieGiajg/86531096796.pdf
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/3570666.pdf
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/berivopu-mivuxivek-bawimaxadumena.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_29bbe1da5d024dd3919a374783b7f47a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fc0f1e4d-daee-4b6b-a9d4-41dcdc457039/very_hard_harry_potter_movie_quiz.pdf
    • https://uploads.strikinglycdn.com/files/1cd2ebb8-7dea-488a-9e01-583c884ef4bb/wujomuw.pdf
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_8d5baadb47a64e9089b729f80dc4f9e3.pdf?index=true
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_384f010a8a754877b9914bdecf4339d3.pdf?index=true
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_1f76d195c2e749beb2ffceecc8ccec84.pdf?index=true
    • 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_off0000ef81.bin
f057035f91b0f05c13b14161a65725480a45d2af585c6945c89cd60eb49d4520
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF81 5336 bytes
font_01_sfnt_off000101a1.bin
1c2b570e7edfb09750ab0044c6878fa7148437481033d3bdf4e218308d41047e
pdf-font-stream PDF embedded font (sfnt) at offset 0x101A1 10880 bytes
font_02_sfnt_off000126a6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 4324 bytes