Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e07d6a6b72aa8e…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 23:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c641a482cba31080619f91b0352054e SHA-1: 75fdc69e76a338595e8ec19123015c4bf0edc89e SHA-256: b0e07d6a6b72aa8eff54ba2e9d92b5455fb6e36f82576b65ebc6af6af915a7a5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or phishing pages. The presence of multiple distinct hosts and disposable hosting indicates an effort to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://irlanc.ru/uplcv?utm_term=jolly+phonics+activity+books+pdf PDF link annotation
    • http://ahcxdq.com/uploads/file/240052088916.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/roxikafabakidagezer.pdfIn PDF document text
    • http://df-foundry.net/d/files/bomijalugulusoravetasupa.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/935bdce15011015fdf55ee10802eb8ce/kafugorilo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d5d23c55b---sivavavu.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/bf89865e65e1360a6ed9cddfcc48de3a/4531927250.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1fcc7716a2db7b4bfa10b3bb2919e79c/wulakivonaruxagipakix.pdfIn PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/43363999317.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/gexafozogusititijodul.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/foworevakotifuluxutuxepe.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/12177327252.pdfIn PDF document text
    • https://kartplast.com/resimler/files/62923452146.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/79195393915.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16072c3721784f---jolik.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd5a2e4c7---besefeleretoxuter.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/47463623446.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/fc30d180ca02f80e0b6e16fdd514c992/pufomofewiboto.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608401686a414---migebaziboxesuximosiw.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4e7fe1a55---37117015879.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c16bddd8fc3---64212542554.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/korodalilakinede.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/genevaxovoku.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/78269218975.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf2cb80f3---kopefidimemosamufijudagu.pdfIn PDF document text
    • 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_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 18728 bytes
SHA-256: 34d670656194a8870ed452cdd3daaeaa954a3df30b15d5894041321d0086f5e1
font_02_sfnt_off00012a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A88 10888 bytes
SHA-256: 966f737072f34c77e72e4b65c1fbcfb9462e62733587ba8e36579ec61a6819a5

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