Malicious PDF — malware analysis report

Static analysis result for SHA-256 62937113e4632afa…

MALICIOUS

PDF

76.5 KB Created: 2021-03-18 21:30:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8c75898737335117c71aa9fff229452 SHA-1: 2c35352d09b313d7f18d2c1c3e15a10c3d4e21a1 SHA-256: 62937113e4632afa6d553f49130ae199df0b9baeb90243e459f3039abc129ac9
246 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically employing a fake CAPTCHA to trick users into interacting with malicious links. The presence of numerous external links, many pointing to disposable hosting, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to potentially harmful websites. The document's content, though heavily obfuscated, appears to be a lure related to 'Diablo 2 lord of destruction cd key'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://mezovuduw.ru/strik?utm_term=diablo+2+lord+of+destruction+cd+key+26+characters PDF link annotation
    • http://idealicaufficiale.website/fofolirumatiziip8uz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_603ecce5c2130.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/creative_thinking_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5ff1d9ad0d6a7.pdfIn PDF document text
    • http://zaximudetebase.iblogger.org/14911833050.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/spring_cloud_reference_manual.pdfIn PDF document text
    • http://covid-19online.site/gitivuwadid6uf0o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491175/normal_60412f165d2f0.pdfIn PDF document text
    • http://nanukokopetip.iblogger.org/the_anglo_saxon_chronicle_translation.pdfIn PDF document text
    • http://testertumentum.space/48731370861co284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_9fcff1c8888049b6b783e2a590b8c344.pdf?index=trueIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_d5d5ee6167874f3e8ac73b3254cc4358.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_173146d42cd84a90ba6972c8a5f805b3.pdf?index=trueIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_11b0be5d83604852abc10eda3c9ee0ca.pdf?index=trueIn PDF document text
    • http://tadufadimokoje.epizy.com/60138237946.pdfIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_fdc5144141b14342881a784027b2d506.pdf?index=trueIn PDF document text
    • http://roxonolabixatox.epizy.com/fiwimujebitorotinuge.pdfIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_890b32cb412f44db8daae0b2573642fb.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_86733d886b8c4736b196f3b36ce9ff0a.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 5700 bytes
SHA-256: b953fadc7e5a9f25084f72cf997b6942e2b949b404a10310adf4a3e6ac9fb655
font_01_sfnt_off0000ffa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA4 10928 bytes
SHA-256: e5b7d4556472e6689a7d21cc0dafbfdab7b12543cebbd967a14a4e14160bd9c8