Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2974a4fb9a873fa…

MALICIOUS

PDF

68.5 KB Created: 2021-09-27 13:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c3aef3380f0a1ea59ddf42cb32fc871 SHA-1: 49a1fa252e3f2dbc01a3d1d89fd584350811c9bc SHA-256: d2974a4fb9a873faf429ba9568103042a7960f574df75878a2e937a03fcae7b5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with an action trigger, designed to deceive users into clicking embedded links. The numerous external URIs suggest it functions as a link farm, likely directing users to malicious sites or further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 68 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://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/rakirubodometerev.pdf
    • http://superbarter.sk/media/file/42773065080.pdf
    • http://back2wood.de/userfiles/file/88645482550.pdf
    • http://auroraenergyproject.it/userfiles/files/49549528638.pdf
    • http://bsa.by/ckfinder/userfiles/files/58290162916.pdf
    • http://fazekaskozpont.hu/images/upload/file/nefiro.pdf
    • http://voyagerav.com/v15/Upload/file/202192535782376.pdf
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/senesefufituxamekibal.pdf
    • https://kozlovka.mebel18.com/uploads/files/29150462338.pdf
    • http://eamenfaraz.com/cache/fck_files/file/13905378460.pdf
    • http://fotofolliasanlazzaro.it/userfiles/files/36376754111.pdf
    • https://tsolisp.com/files/file/73134895881.pdf
    • https://ladachess.ru/userfiles/file/parodelukug.pdf
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/depuxusutedizesa.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/od5m7oafo1bd0n2nrh5nom7jk6/mudatixujuvizebegugivi.pdf
    • http://gardatrans.com/content/Files/wumurinavirelafubin.pdf
    • http://xpeedon.net/userfiles/file/20210917202935.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6d6be53bd---vekije.pdf
    • https://naveenent.com/administrator/imagetemp/file/lajud.pdf
    • https://foodexgida.com/uploads/files/dimomuvonivajofut.pdf
    • https://pharmawell.eu/ckfinder/userfiles/files/70235468468.pdf
    • http://sun-tes.ru/files/file/69609592374.pdf
    • http://wsm.hk/images/files/pemapozulajubu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=kill+shot+bravo+hack+2020
    • 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_off0000b0fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FE 16792 bytes
font_01_sfnt_off0000c910.bin
8f75e68e634b970a5349706dff70304f4711a91de3b3a2c85afe934bc5fe5786		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 14080 bytes
font_02_sfnt_off0000ec0f.bin
048243d61ab3f527ecb5ba3d0ec4892fcad947301edc084d75a7c68794f6ac8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 10620 bytes

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