Malicious PDF — malware analysis report

Static analysis result for SHA-256 00682c5dd68162d0…

MALICIOUS

PDF

97.1 KB Created: 2021-07-19 05:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3a05f8812c85396c13668e552d4501bf SHA-1: dea7eb9949fc6c1c98c2b73428f807b141223538 SHA-256: 00682c5dd68162d00d7be406133ae725a42cb359bfd81c47279af1a841680b54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e01f2c61ea1---pubafarafinojiji.pdf In PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4e01b47f04e0140011f7ede6bf6ed71d/dulil.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bbd04a0d8---33422687595.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/49092794521.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/76771795598.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/63064239924.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b1392794216215c64e686cf9c674bc6/zumeburaximo.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/luondmht4m0u5utu2m23v71buq/bibejiw.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/bbeb8bb85a4dce97c9edf69898cd85aa/43444361193.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/xeravikajukifonuka.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a04e56a7---pedapoko.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160792ac2b379d---86668604838.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b70c19ef2---fezijas.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/vejaposotamewamuvosif.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/53947106280.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/nalutimoxamajuwuj.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/kuzasus.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/14685075602.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99559e8ab6---wegajelimawoliliw.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/zibuxebotiz.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/godunokalopesumutu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bb9c92b2c---53949723173.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094852e8448f---lapapunuzupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=do+tea+bags+go+bad+after+expiration+datePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000157da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x157DA 18924 bytes
SHA-256: 4adfbb6c627a8bed2a0ce9764a9781148df935382a7165bc140a69fb818a4014
font_00_sfnt_off0000fc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 10868 bytes
SHA-256: 7fb9e69cf8fc8e9ffdd6951751284f9dae5e85db4942b61f1625105c4cb84925
font_02_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 16780 bytes
SHA-256: cc24040930724aacfab9e340928b518220be7b26ab8f069df099e15deb3986f1

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