Malicious PDF — malware analysis report

Static analysis result for SHA-256 d438f27bad18f603…

MALICIOUS

PDF

80.8 KB Created: 2021-06-29 03:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5407d58995ab97bec56618540e5aa4c1 SHA-1: 7cef7c7f42a1fb0c30522e0f73c0bf3db5b2fdf5 SHA-256: d438f27bad18f603fb3f2286455968b846f2f1087760c5ed4040bec9daa6af44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/f7024a83e4e2042e2deed3d56f7c18ca/mebovipofovurizokog.pdf In PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d0ef98bbe---pakag.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074b6141e3ae---jukenuju.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/7872693953.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/nabet.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/93sh445ump8buhb2mbt3mhapoq/zolapavadiwo.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97fa85093---vetoton.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2qj43qp1dje86fuuimb7lqt53n/17857550062.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb2270c8dc---82583026592.pdfIn PDF document text
    • https://maility.pl_adresuserfiles/file/96519244159.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/dovobobebuf.pdfIn PDF document text
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/peluxitobib.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944af3456a5---sejudanozanisegow.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/u861rmd0l99slbdshjbs28ateg/mabivesagi.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/840d167d298ea6fee14fa6d80b6ece08/12044562871.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c14431ee290---lemotuke.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/de9bf2f1d9b36fac6275ccd744a4d7a6/fonawepofopapibuwi.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6e31e3383---83323858058.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/a4faafbc0ab616b18eed1ebb116700fa/mimozajotoruzokametepo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfa8b318b7---78353215343.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/0c008e758165ef193fb4e4590c2a6534/sijozadazibunugamube.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4aabc9a96e2265c6b92aed0112186901/62538420796.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/792454175eca168e4e099458b9712a39/64346352850.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7rbufvk1c3ve616r5tp2bun5ij/juripezadanilasaj.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/bexowojaxaso.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/70517306711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=hollywood+dubbed+movies+watch+onlinePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 17240 bytes
SHA-256: 8ae94b6a19af1a188a22f65fa1a2573eb1f4d98dcf5e4afebde25da34801dd92
font_01_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 11032 bytes
SHA-256: bb984dad7eebd6a88097d029590cdf75091a581487300a1497f09307b0bfb667
font_02_sfnt_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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