Malicious PDF — malware analysis report

Static analysis result for SHA-256 179758d96bdf8180…

MALICIOUS

PDF

67.4 KB Created: 2021-09-15 06:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6321a52c02638864c1c65534a9fab5e4 SHA-1: 89bc9bcd275b2eefc86fffc1b57614c26cfcfd7c SHA-256: 179758d96bdf81801ceb35b11bf5aefba1e7f89509c4c51c1093c2ff5aefa1f2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is detected as malicious by ClamAV and flagged by an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external URLs, suggesting it is part of a link farm designed to redirect users to malicious content or download further malware. The heuristic 'PDF_IMAGE_LURE' indicates the document is image-based with an action trigger, a common tactic for disguising malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=fortnite+v+bucks+creative+code PDF link annotation
    • http://dogoxuavanay.vn/uploads/files/14011467114.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/23860366318.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/gusixusudojunijegike.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/70d8da3a943b3d1ce9edd11e7efeed0c/dikew.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/87567681378.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/89122749430.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/64692517817.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/zeposujopeweguj.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410e98e0745---dubuwe.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/zakaret.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/berapixuki.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/32188468297.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/faguwigiko.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/69440133821.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161345eada6c83---59740653125.pdfIn PDF document text
    • https://superchills.com/userfiles/file/sajolawatufujeranusofud.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///18434300081.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/56733397572.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/60759471645.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/muxiku.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/32622114670.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/29010654118.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BE 10692 bytes
SHA-256: ebfd22f16c3c30122e4456beaa31d9a4400b4f791a5f4a820e31558f8bd18d2d
font_02_sfnt_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 14048 bytes
SHA-256: 888ff283f6a6c3726d4552507406ea4189e39bfbb02bd2415939044d84038d51