Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb2ac5e3461561d…

MALICIOUS

PDF

82.1 KB Created: 2021-09-13 06:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b707fa70d36014884e3deee989b7503e SHA-1: a083f915ea2329ce2fd67e940a8648f268c0af23 SHA-256: 5fb2ac5e3461561d05533cce4d1f59c6e8823624ec24472a5fa5eb872ac0ce18
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The heuristics indicate the document functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS uploads. The presence of numerous URLs, many pointing to disposable hosting or compromised sites, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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 http://istanbulballoons.com/ckfinder/userfiles/files/lalorila.pdf
    • https://kapefashion.com/files/files/30259200701.pdf
    • http://malir-naterac.info/UserFiles/File/17790772049.pdf
    • http://status.cz/UserFiles/File/96875151489.pdf
    • http://tauroconsulting.pl/userfiles/file/rawav.pdf
    • https://netshopnepal.com/userfiles/file/wowigopenixomuxufofix.pdf
    • http://creativetechno.in/userfiles/file/serapepokovapeneleviv.pdf
    • https://priscar.com/documents/files/57795185145.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/kvvukrdgv82m0p6mqphminfhk7/26822388346.pdf
    • http://nanoservice.cz/upload/file/xasapivinefabanagizuvaza.pdf
    • https://civilkontroll.hu/uploads/file/sinanivamafojun.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386c072c1f7---movoxiwudidenubo.pdf
    • https://sanghvicranes.com/staging/media/86703884305.pdf
    • http://toroisg.com/public/images/files/wupigefupofomapalikov.pdf
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/zifozumatavelaluz.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/20750926580.pdf
    • http://marktoby.com/akram/know_news/admin/userfiles/file/99271853487.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133adfb143a3---davomufenenibunutemota.pdf
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/gowubizuripewatexe.pdf
    • https://autoradiator.mn/uploads/ckfinder/files/33515427185.pdf
    • http://101balkon.ru/upload/files/55977839146.pdf
    • http://studiopol.it/userfiles/files/tinewavuvewiv.pdf
    • https://thegmsbihta.in/userfiles/file/vawurisulimebu.pdf
    • https://plasy.com/uploads/file/fabizulafoburepo.pdf
    • http://kuresi-kaitori.com/upload/content_pic/files/narikapafanosutupazi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ek+haseena+thi+ek+deewana+tha+full+movie
    • 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_off0000dbc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 16792 bytes
font_01_sfnt_off0000f3da.bin
5f7c9c882b7268ea280bcbcdadde39ec609abcef0720b0c72dc94bf04bb5854c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 10844 bytes
font_02_sfnt_off00010cc0.bin
9b957f6ee204b8d30299c627e0991c06a587b9198fd20ecc7fbdb49ed46ddc5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 17688 bytes