Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be99e2db22303a1…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 03:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e75331791f2acafd1de56cdf5a5cb0ee SHA-1: a283988387facc1f5f926bf2a20c3f0a39e965fd SHA-256: 1be99e2db22303a1fb60df7d660928a6a8ae7f553699568cd757855a20e06acc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking embedded links. Numerous URLs pointing to compromised CMS uploads and disposable hosting are present, suggesting a distribution network for malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=the+old+guard+full+movie+123movies
    • https://adium.ru/userfiles/file/71417382574.pdf
    • https://pmapmc.com/userfiles/image/files/28724004776.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1bcb95e4e---ligifizuxemegenepusitanik.pdf
    • https://assofmt.org/ckfinder/userfiles/files/bemilefizaf.pdf
    • http://nanumed.ro/uploads/files/39847223467.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133fb39912ef---kebawap.pdf
    • http://floral-design-lindgens.de/userfiles/file/lukununupejiwigosipo.pdf
    • http://sgyscom.com/upload_fck/file/2021-9-15/20210915141444747664.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b42157be9---wufexolijetekowewaribi.pdf
    • https://aspirans.com/files/file/majoligowelasusel.pdf
    • https://ptogel2.com/contents/files/18134798749.pdf
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/lezuloroxudunudinogokivi.pdf
    • http://teamtrinity.net/trinitya/file/10465238711.pdf
    • http://hiro-seiko.com/upload/files/56979910896.pdf
    • https://kaptenhoki.net/contents/files/mapuzafek.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3d56529d69c9f41bf0ab9d3148c74e92/fefasol.pdf
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/19021822096.pdf
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/fovanomudalivitupe.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4b2a5d408---19914692910.pdf
    • http://master-stroi76.ru/userfiles/file/lopafilugozaveton.pdf
    • https://dalnoboy.com/data/filestorage/upload/files/96512427082.pdf
    • https://absoluteanytime.com/media_file/files/files/pamaxedapupejesesofegu.pdf
    • http://fruitvita.com/files/files/74771621192.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fd4b93bb9efac644b1c65ddfa41e58b4/15154890662.pdf
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/fikabenox.pdf
    • 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_off0000b07f.bin
41b026a46580eeaaa0704af35c36c2b6d830fa759f6e5f688eabacfe4036a89d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB07F 11072 bytes
font_01_sfnt_off0000ca36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA36 16792 bytes
font_02_sfnt_off0000e248.bin
b3601dfdb8e004e2c2a7b72c63dd44a61c4579ef5f0c81162edad6985a4c4105
pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 14136 bytes