Malicious PDF — malware analysis report

Static analysis result for SHA-256 d067d0266b21891a…

MALICIOUS

PDF

87.6 KB Created: 2021-08-14 21:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8ab11a3492039206b5343fe20a2ee2c SHA-1: 5d4d5f9dcca5650362adaa40b78afb56b1809904 SHA-256: d067d0266b21891a656db37e30e2a97f2ef71310b03b31f17c782acd04282511
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/r3irlhjadjim6k3s4fnigusnd4/89846849292.pdf
    • http://jan-fotografie.nl/upload/files/66605461057.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/12551761822.pdf
    • http://merwepizza.com/upload/file/sajutunodonugixuxuxog.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160768904754e9---jutalusaxazi.pdf
    • http://paliukenas.lt/i/File/bebezedugasasu.pdf
    • http://liavanhaeringen.nl/userfiles/files/7757259284.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2cccb5752582792f5500c965927a3590/34255989945.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4ec876650952de39f1774aa034772d42/komiwezeledagurinone.pdf
    • http://nw-line.ru/generic/uploaded/kurutizugom.pdf
    • https://penzionradvanice.cz/res/file/koxivureden.pdf
    • http://elfobchod.cz/foto/Image/file/nefebomupuzovalobatixa.pdf
    • http://jedwines.com/cmsCart//upload/file/kexevuzikowomerijofe.pdf
    • http://suapaiatuipelehakefamily.com/clients/80707/File/49306596990.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/116c44d8d403fd516c275d4dbad808ca/76551427634.pdf
    • https://beaszemin.com/files/28398254709.pdf
    • http://rehahomecare.com/upload/editor/files/bepig.pdf
    • http://mp-journal.com/media/file/57249198789.pdf
    • http://studiopignotti.it/userfiles/files/91196284207.pdf
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/81911781112.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160710149b0f04---33118392914.pdf
    • https://observatoire-omic.org/documents/file/40395306152.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3a592742---paduzotanawore.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vh133bf84i0pl39uviu609udhs/jukapugebiduvomowozoris.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+calculate+credit+card+interest+malaysia
    • 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_off0000f258.bin
6bbacd1131f075d105ab3fd960dbb51dd33e271e667ffa8756a7e5c373676dd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 17300 bytes
font_01_sfnt_off00011f61.bin
dbfea643e2b77ad8d6787b9314bd78ba86b39ef828309e0b9c4f4f25cd2501ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F61 10824 bytes
font_02_sfnt_off0001385b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1385B 16792 bytes