Malicious PDF — malware analysis report

Static analysis result for SHA-256 324bdf8790f08b21…

MALICIOUS

PDF

86.2 KB Created: 2021-06-29 02:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea2c7a1db7b5da87b4bf4a418b0527ed SHA-1: 3ef7ccb6f2d69bd38521e5b12dbeb013bdcf5f18 SHA-256: 324bdf8790f08b21db776385ed75005fa4ee0106ee5666ad110e65c8df24473f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798f9788798---21698569424.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/129707eebcdd31850d3aeef34c178cda/38802721838.pdf
    • http://yaqeen-eg.com/userfiles/file/62654302025.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/317739eef701d6584740878911ecca46/semajig.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed3fc7713---81710694336.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072a17fea590---92163636295.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/gdt3l3vfsdj345h2clckpuqueb/tuzidubekerimimib.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8bf1e90c6---89029269597.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/4e2e2ff12a3fa7c8ae24c738e88e126b/wofosizarem.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/49c7163b9486f7ce4cda829df352c862/57484706134.pdf
    • http://sea-cruise.ru/ckfinder/userfiles/files/nopej.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c6649797b---zujol.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/4bimc3331v6o8ld98ec9i2q851/gidupegupumofopibaluli.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4260325470938b458e6db60e17bb8f16/makoj.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f55e42fc---kilafufilevonepewixeporud.pdf
    • http://elcampoeco.org/FCKeditor/file/manujof.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/n387su79lp3d4441b9eb32ie55/99426159473.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/d929af06b944c498ed3326c439d15248/18037474858.pdf
    • https://davaocarrental.com/images/file/basafulokekedafibilimiwof.pdf
    • http://absolutelyneon.com/userfiles/file/78076844788.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/i4nlag5q364dkkhndsgfuo941e/23572424220.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607f817a3e536---zavinafop.pdf
    • https://prtl.pl/userfiles/file/83757698432.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=energy+conservation+in+lighting+system+pdf
    • 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_off0000ea53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 16792 bytes
font_01_sfnt_off0001026a.bin
9b36d1935fffe47328f4d0dfbec61ba307205e89256d0db90f4ecad046360391
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026A 11228 bytes
font_02_sfnt_off00011c55.bin
d6cc69b8a90114e8c9a4dd7b40b042c4362527ebea0e9c18cc1e8bfb9f7b625a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 17128 bytes