Malicious PDF — malware analysis report

Static analysis result for SHA-256 14679001b80f7a2e…

MALICIOUS

PDF

102.9 KB Created: 2021-07-07 16:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c1b558daa2730622dc08f26f4345587 SHA-1: 4b9cd20331840f77e8d870451d8680433a0ea207 SHA-256: 14679001b80f7a2e6db0fcba40807c8120b5811d3fb8e3916490c999802de0b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or use disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself does not contain readable content, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://taichielite.com/louis/taichi/ckfinder/userfiles/files/33573622809.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc944c87b---14129489162.pdf
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/143554544.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/df5747328b1e294df211e6e744bbf542/xonisadaf.pdf
    • https://ajitcoatings.com/uploads/waxebezurot.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/hm5rldf4ubi1k7vqspaf3omfe6/xokeloluxogujikenene.pdf
    • http://farmaciacogliate.it/userfiles/files/66618397560.pdf
    • http://ulv-fogger.es/d/files/rifajasisonurugurogegadod.pdf
    • https://info-jimukyoku.jp/lot/upload/files/70532341094.pdf
    • http://kirilmazbardak.com/userfiles/file/xalejomi.pdf
    • http://trans-serwis.com/userfiles/file/bijusaferibanuviguvoso.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eacaac0b4---pilomineweduziduke.pdf
    • https://suma.ca/upload/editor/file/timetepojobalotoragoku.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4db98523c---wotunegigiron.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/089a78d0a0d242ce1bd681a518dd1703/migebibamafube.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609762dee9843---77902131325.pdf
    • http://ha-sine.com/d/files/83883727977.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cb4255bc5---62054366963.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160792f20e35bc---buvutifajofu.pdf
    • http://flatadministration.com/uploades/fckeditorfile/pufidefosotaloza.pdf
    • http://www.hangmandigital.com/files/file/13029854093.pdf
    • https://aterhesseg.com/up_image/file/69746970469.pdf
    • http://sillajen.com/fckeditor/_upload/file/semabovojogenisu.pdf
    • https://aartipalette.com/userfiles/file/xemila.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bacfa2c967---28864007608.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/95105190919.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6uh5ov0cb847vh0ap4fqsbvobh/96393425219.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5ab9b9d414816e608eeda236694e4dd4/vuweladag.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=web+application+backend
    • 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_off00012d3d.bin
6b9f30369d2808bbe96872875555ecf349424a15c87445e5ac3c663faae07341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3D 10464 bytes
font_01_sfnt_off000144e4.bin
ec23eb68a014fd1a2e75fce1cc43584f149dba23efbead65d7c0cfa06a694d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144E4 18188 bytes
font_02_sfnt_off00017473.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17473 16792 bytes

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