Malicious PDF — malware analysis report

Static analysis result for SHA-256 216447ac00c5ef5d…

MALICIOUS

PDF

97.2 KB Created: 2021-07-16 08:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc4130706cb88dcd6f2fc7f63783fbde SHA-1: f19e46004f360c3b32bc884b042db2f7cdb3650f SHA-256: 216447ac00c5ef5d7ecb870c8ae1d8d6e4c1311388b11f0b9ab36f6d8068ec47
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous external URLs, many of which point to compromised WordPress uploads or disposable hosting, suggesting a distribution network for malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://infrive.ru/uplcv?utm_term=new+phone+who+dis+game+how+to+play
    • http://t-p-fortune.com/userfiles/file/jazimunewakesuvurezod.pdf
    • http://greenld.com/userfiles/rakujo.pdf
    • http://vipnjl.com/userfiles/files/monamiwuxeremipudategojat.pdf
    • https://aartipalette.com/userfiles/file/79720124966.pdf
    • https://groupburuemas2.com/contents//files/lilonebadof.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b1b306046---tapusoxabomunevefi.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847d10ac8ca---nobesobojafuvorot.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edb59da63be---vikumokazarofedetige.pdf
    • http://pwr-tech.ru/userfiles/file/wojasedat.pdf
    • http://xn--dlek-5qa.com/admin/UserFiles/file/23116250425.pdf
    • http://globalquestconsulting.com/userfiles/files/22972540733.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb06aa0732---lejudesezak.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8baa0b6ad---sidiru.pdf
    • http://nhadephoanhao.vn/upload/ckupload/files/xokigas.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0011ba0c3---84572902213.pdf
    • http://icltindia.in/userfiles/file/logupiligud.pdf
    • https://aihr-iadh.org/uploads/FCK_files/file/juwumox.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/79d24b6a0871d32735d08b67e1b43a83/tenodawibogawilugojirel.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/8us7m78pkca1gqp7qvm3lqr71b/98319015964.pdf
    • http://hutergroup.de/userfiles/file/lapofawulijuga.pdf
    • http://sivam.pl/files/file/56698559296.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a46c88f8d---jetegom.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9487444f1---nanapikerulupobefepujof.pdf
    • https://marjoyunlar.com/calisma2/files/uploads/ruvinujowaxexotenoludogi.pdf
    • https://ceral.pl/ceral/pliki/file/60494864261.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_off0001181d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 16792 bytes
font_01_sfnt_off00013034.bin
0653265578602a4991cd4c948b0db21407b5273e476df3335946bbe3cb356cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13034 10916 bytes
font_02_sfnt_off00014928.bin
f13c877689b89dd1c9a3f112e18c697977202f66c5858e95f2dd30800108c25c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14928 17740 bytes