Malicious PDF — malware analysis report

Static analysis result for SHA-256 78023ce8e141e84a…

MALICIOUS

PDF

102.9 KB Created: 2021-07-02 16:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a3d89d322fdf4724e1ea6b01e90986aa SHA-1: 8ba8050df391eba7366b67e3117d6659df79652e SHA-256: 78023ce8e141e84a69c63634dff42cdd944343d70772edb831a39666ab8407a6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/agm0ea273ugqu0hbf73h5ove55/12785287889.pdf In PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e60559d11b---34490251047.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5841d589d37e37e0fc688ecf35fdb898/6352637713.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/a93v339ehjsfasv94hdd0r61iu/81089462915.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc78fc3feff---53136171253.pdfIn PDF document text
    • http://nature-revive.org/files/file/zitidikefakekotijapojuvax.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/ed60084ad5bfdcefcc2d9fa7001529d0/mivuzegu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094617c9f170---7798802709.pdfIn PDF document text
    • http://airfa.it/userfiles/file/nesopudafut.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160851461c9744---virotodawobamikosaxiseram.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7gqhb4rpang451lbg08uahrbas/18592629062.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/u3fslavvv4g6vinvq3cevlma70/nipugejudotoladalug.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/99914932015.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/80809748798.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608452583bffe---pabezubivovokufekobu.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086f39df0b7e---befatoge.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/xefalokofojulojosirotobi.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/18fea55f60682ff98ae73e60da8d1734/vufewuf.pdfIn PDF document text
    • http://krikrik.ru/uploads/ckfinder/files/wipititoxebafusubabej.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/68522558470.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/bekopirisinuvekod.pdfIn PDF document text
    • http://614move.com/clients/4890/File/36208734123.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d5d44d167a22f7b1cfea92023f7f7b14/zizutobosoletuterezodul.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf5de173b7---84148106501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+mr+mime+in+pokemon+swordPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001029c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029C 10696 bytes
SHA-256: 1d0838329aa20dcd6dd132f6c49a4c62cc42caf39163afc4445819236005df52
font_01_sfnt_off00011aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEB 16676 bytes
SHA-256: 6350d36427e6ae8b93fca409038c8fec5e843895c31bf13eebbbc9db54ca855b
font_02_sfnt_off0001328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328B 3656 bytes
SHA-256: 9d2ef93772c76751b3e384f2e02d83e63a4ce0c6ffee132e8dc7ce97d55d2ab4
font_03_sfnt_off000140c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C2 21000 bytes
SHA-256: a3abd57ddd1b50ca557aa1e12c4625312b0ff237e5c0b7acd3c3e5842e73c758
font_04_sfnt_off00017539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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