Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ca27508be52774…

MALICIOUS

PDF

102.1 KB Created: 2021-07-01 22:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e57ad5a7afa45bc99e7a64e1d6501e8 SHA-1: 10c6e36a20077312846bdc22869435e493b87a8e SHA-256: 46ca27508be52774e6ad69418ba630a51f08a83c2ae10d813265521f3038ed4b
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 or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://geneolock.com/locktactyuma/userfiles/file/49961734982.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8065d7c60---dugijukilanejulaxotuxed.pdf
    • http://beiks.info/public/file/84155922084.pdf
    • http://boathousebrokerage.com/userfiles/file/toxakezesawa.pdf
    • http://guinyardfamilyreunion.com/clients/62985/File/1682594946.pdf
    • https://andrejc.si/files/file/99482936219.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/f1b8e5edb6d0a4114fd7bf6e9cb694b4/34875512781.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bae853b73830199b33a5f026e6727c98/77529350043.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed3615797d---nanuvi.pdf
    • https://renault-service.com/userfiles/poneravilewudexuwuwuj.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/9c405158e8488ab6ac5bca5e9c52755a/65404477036.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/s00df2f4ugq4vcu2apso4otj69/14439836045.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3eaa75472---xutisejukewasuweladogax.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9e6c464e7---jezuvoxikesisadogelezi.pdf
    • http://sns.hu/_user/file/dinitajegen.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/0a61bdf2f5720a13853df5b66f8f4e87/11881944765.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccadd7ea8a---49426446585.pdf
    • http://alexhofford.com/temp/files/file/jikozuruxufivigadaxipep.pdf
    • http://bestcareloan.com/ckupload/files/fanomi.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a246deb97bd---sikere.pdf
    • http://terredellamagnagrecia.com/userfiles/files/4501243433.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a2ab60be6c3d791733dd6ef755d03018/31524708561.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6161768228---jepamofotewukesinufujoj.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/4onopjt2arhqc3oikmqt4g7ubc/nezuf.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608687fc11ebb---18723849192.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=middle+class+household+income+2020
    • 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_off000128e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128E2 16792 bytes
font_01_sfnt_off000140f4.bin
f28df89a7c182bc8078543317920dafc7f2153c5aab71c1c416f6ff2031ce213
pdf-font-stream PDF embedded font (sfnt) at offset 0x140F4 18896 bytes
font_02_sfnt_off00017241.bin
9dbdc8c600ac979382024f739ee994e0609b55aa99d4759a41650f715ed5e16f
pdf-font-stream PDF embedded font (sfnt) at offset 0x17241 10772 bytes