Malicious PDF — malware analysis report

Static analysis result for SHA-256 0675336c49502c98…

MALICIOUS

PDF

67.7 KB Created: 2021-10-03 06:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: edeeda2a92db0a25c79459fdecc343bf SHA-1: 7c76729b9a478731eded57384543a47f4feca38d SHA-256: 0675336c49502c985a2ad20e30a2ca9c099902a99aec877b6798de36f444943c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure due to its small size and image-based content, typical of a screenshot that hides a clickable action. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites hosted on domains such as montoaneli.com.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://montoaneli.com/ckfinder/files/widevinuruzepodefiwiweg.pdf
    • https://kolkataangikar.org/ckfinder/userfiles/files/tojidinamuruma.pdf
    • https://riolospettacoli.it/filesUploads/file/toraforako.pdf
    • http://fratellilongoni.com/userfiles/files/76820565260.pdf
    • https://newsru.md/upload/userfiles/files/59687737658.pdf
    • https://netwindowvn.com/uploads/userfiles/file/14217274982.pdf
    • http://agriturismoilnoceto.com/userfiles/files/58077081021.pdf
    • http://caytrong.vn/Images_upload/files/getavemezipufuguvitupu.pdf
    • https://keiba-like.biz/js/ckfinder/userfiles/files/87123367151.pdf
    • https://decisionstogo.com/fck_image/file/pixapuxelujegawopi.pdf
    • http://vet-spb.com/userfiles/file/fudemuwonogokozodasojal.pdf
    • http://emaaravm.net/upload/files/42860222575.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e4d40560a87f350d6abb144a01c0d5ae/79913324699.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/022c5399212c056d643ce4515d00a04b/wuvajasowam.pdf
    • https://davaocarrental.com/images/file/pewawovipodorato.pdf
    • http://market-oborudovanie.ru/upload/file/61865550837.pdf
    • http://sunrui-ti.com/d/files/92424708731.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/finuzazukemi.pdf
    • http://beautybybelief.com/admin/images/file/jexezebunosisozibogi.pdf
    • http://ride.hu/images/uploads/files/tugukavigukave.pdf
    • http://www.dean-cpa.com/files/adminpic/file/27403819516.pdf
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/govozibopibonasade.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mature+seamed+stockings
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abd7.bin
a5f5a3d7bee6739399ab6e54fea601b42e2c3c04398538c9d72efcfced5a03c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD7 10852 bytes
font_01_sfnt_off0000c4c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C0 16792 bytes
font_02_sfnt_off0000dcd2.bin
31d98377250f610ee9218954248d0075e6db575ef1b484d3d80f0e44dc463d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 14180 bytes

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