Malicious PDF — malware analysis report

Static analysis result for SHA-256 2995a4dc1c2f3572…

MALICIOUS

PDF

69.5 KB Created: 2021-09-28 18:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9505838031733202415d34b1de1ed195 SHA-1: 630c1ca10d7b7a98eb304a4fabda56a77377613a SHA-256: 2995a4dc1c2f357289b19b0a0b687100360046ee4d5544a95b8737c3d7adce8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The heuristic 'PDF_IMAGE_LURE' indicates it's likely a phishing document designed to trick users into clicking links, further supported by the 'PDF_SEO_DISPOSABLE_LINK_FARM' finding which points to numerous external URLs. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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 69 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 https://7mark3t2-7aya.com/contents/files/tovevo.pdf In PDF document text
    • http://cnpair.com/userfiles/file/21243353168.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/bitesagugosidufufavive.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/33025051179.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/pokitel.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/d5528a081139d8392c929698f4f68bc4/kukisekoxaxuduzo.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/turirazafepigizorevive.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/af62fd8b9d7cf3eec493eded313673a2/fubisorafoseve.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/9175412105.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/vinisesajovefeb.pdfIn PDF document text
    • http://thegioioto.store/upload/files/41921247764.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/befirilotowo.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/fizawefilurenakem.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/1574896161.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/mizikimirul.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/buwum.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/tatizasuvekamuw.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/lubewadeporixazedu.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/12165316271.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/wiwokoxulafamegarat.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/73527867378.pdfIn PDF document text
    • https://mimzyonline.com/userfiles/file/xisivufozujovipejataw.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/nunubekavukaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=watch+90+day+the+single+life+online+freePDF link annotation
    • 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_off0000b1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 14488 bytes
SHA-256: 0963ac284d91633bb1f6dc7da76af4696d94ea48d081b6bfe59ac96de00f392c
font_02_sfnt_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 11152 bytes
SHA-256: f968506e229cd9d49d35144cfde35345b16155262ed1271b39bbf286d1d8b041