Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73f2c8965806054…

MALICIOUS

PDF

141.0 KB Created: 2021-06-27 20:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95bed8fad1b802098d51de904283bd9c SHA-1: 9b31745c2092ead1e27499963486c82ab4cfb06c SHA-256: d73f2c8965806054ae122daeb00e6b851c2364b9dcc0abbba82b592b301c3f7a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which host other PDF files. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c51ad5472f7---25794247523.pdf
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/dakud.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/7bc1a55ceded70d3e9335256782567bf/79114761363.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609514221b368---7300815600.pdf
    • https://tolgyesvolgy.hu/userfiles/file/fejabixage.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ipbq4b529grg1kcokdvtqbi31e/pudadopulomos.pdf
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/jukigoroxanuxaxedemak.pdf
    • http://pnmanagementsolutions.in/uploads/gegazanimidek.pdf
    • http://timandlor.com/userfiles/file/16991569332.pdf
    • https://actor-conseil.com/files/file/jewuwikatitoresin.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f941d1caf08849e0c981ac3a757d6c7a/zegazikuzurezatiwolepi.pdf
    • http://inwallendorf.de/userfiles/file/xotuxesufigumosenalawogu.pdf
    • http://chronicles.ae/userfiles/files/15124617809.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jcshntm3il88ft61il15ohnsj8/nojovutusuti.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160888783020f7---9335552579.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc610481564---zuxazazejunefanetis.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/487402041305455c8d27cffeb4bcd6f6/56083408575.pdf
    • http://trendymamy.pl/userfiles/file/labumux.pdf
    • http://kleiberit.ru/files/file/sanadosuwotevigaluzus.pdf
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/letekese.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746894dfa64---36107758470.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/531pavm52qv8i3h6ns9uem4b4b/kimizunim.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/chhvokcjchqrlros6fr7ng1mkg/12036380988.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a8793557f3f6c04c3dc52082b40cec56/mutom.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/5b0084881aa6dcc8b8813cdfc8888dda/werinubasopus.pdf
    • https://dolcezzecaffe.it/file/famugazewovarazimu.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/3c7babecceb4fa79beb72ac85011b877/90535561358.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be25412d450---59016722635.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=sony+mhc+gpx5+manual
    • 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_off0001c7a5.bin
39b3319b94e3d0f91c26e9c714b7e8fcb65f68b7acee48c5c8420bd73c2c44af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7A5 17828 bytes
font_01_sfnt_off0001f572.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F572 16792 bytes
font_02_sfnt_off00020d89.bin
541b958823419ceab6775f7a7dfa7cd5558425e0f629180488eef6d1aa7e5d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20D89 10756 bytes

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