Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9c03b43651ce67…

MALICIOUS

PDF

69.7 KB Created: 2021-09-27 10:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 088eb38de32e06fd37cfce20a64c40dd SHA-1: 0d78c52cd48c98a5a9e8c4c338e1e63fcc87e335 SHA-256: cc9c03b43651ce6763bc266edf45423429f75e41fcc24c791cb4e16053a3e948
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to disposable domains. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document's intent is to trick the user into downloading a password-protected archive, likely containing a malicious payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://polaryachtmanufactory.com/res/wysiwyg/file/1564445033.pdf
    • http://webbyshoe.com/fckeditor/userfiles/file/godubofulug.pdf
    • https://stehovani-ostrava.cz/static_pages_files/file/fumunejutuguvexaxa.pdf
    • https://netron.pt/app/webroot/media/files/sekonofuga.pdf
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/61307383211.pdf
    • http://bsbcarpet.com/userfiles/file/mexagesojesemudin.pdf
    • https://ximangcampha.vn/upload/files/xadawegivaxofek.pdf
    • https://lifesmart.ro/ckfinder/userfiles/files/tipagiligepewu.pdf
    • http://ambvetesopo.eu/userfiles/files/92955200716.pdf
    • http://proximeo.com/ckfinder/userfiles/files/77899967457.pdf
    • http://sushibelovo.ru/files/vokazukunedogix.pdf
    • http://verkaufs-akademie.com/userfiles/file/kirolug.pdf
    • http://grandioso.asia/editor_upload_image/file/dipakenetulo.pdf
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/80724137453.pdf
    • https://www.aaptuk.org/ckfinder/userfiles/files/divezutunenodafimetodenu.pdf
    • http://ristorantebiscione.com/userfiles/files/maguwe.pdf
    • http://hide-bo.com/img/tmp/file/sizesorenexejumakopavonu.pdf
    • https://www.jakketoes.be/ckfinder/userfiles/files/misapamisonulojabukux.pdf
    • http://asbazainville.org/userfiles/file/mujomuroja.pdf
    • https://volandovia.it/public/fileeditor/file/sobinewuw.pdf
    • http://sochi-riba.ru/ckfinder/userfiles/files/ratizawejixugiwumeziwav.pdf
    • https://www.eos.org.eg/ckfinder/userfiles/files/jadutelopafemonefujoviz.pdf
    • https://nutstudio.it/userfiles/file/56728033787.pdf
    • http://tea-ra.com/user_data/upload/save_image/files/mapatemozafeluseba.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/davokisatemozijaxulisad.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=need+for+speed+hack+android
    • 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_off0000b102.bin
d1da629722afe7673b3dce6933ed943d1946b9136777624f26b75d45b310ca13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB102 10644 bytes
font_01_sfnt_off0000c94a.bin
b5be2198bec5aa96426552473d0171a2d06ea131fbd487e9bd7d712b9645aed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC94A 15948 bytes
font_02_sfnt_off0000f15f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 16792 bytes

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