Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d226d7d3cf2b0f…

MALICIOUS

PDF

86.8 KB Created: 2021-06-29 02:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7509f16dee2d9d4e99a6f9d2650ed034 SHA-1: fad10c9b93bad181a482dd2557b4997f2026cf63 SHA-256: 50d226d7d3cf2b0f72436a5e6245a3bcbc75f28c63609c6ca0467fb07cde4f53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting. These links are likely intended to redirect users to malicious sites for credential harvesting or further malware delivery.

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://aarogyamedico.com/userfiles/file/15417155746.pdf
    • https://room12shio4.com/contents//files/nanoguxapuwurikuvanokujad.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/cf73b6f22466d90badb761e9e46b4e5b/xevusumen.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f56b7abe44---pomotasowapikuwiwezak.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/8720bab3bc5b21e7b756b7fce9f393b0/87919059988.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfb0586d85---wunowasifofera.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/77ivofggeme0fm19n65pqlejl0/2462021571.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160794e5fa7f24---72154292811.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1082b39dddd47f2d772e85e34252a1be/gezopupudorewegixoguni.pdf
    • http://www.vikingmaterials.com/img/pomoxegejuvi.pdf
    • http://marinapogon.pl/upload/file/41523794212.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/cfe158734f543e4cd6c0725f5cec05b2/napodileraleresatetelako.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf991ccba09---mafozefitixoj.pdf
    • http://kaies.cn/upfiles/file/7507895258.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/78659d5b0ea95b870e796283e3ecf3d8/fatefazejitotokugixoxoguv.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/jagudimazomoguzazim.pdf
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/60272608232.pdf
    • http://chinalabware.es/d/files/woriretifefifapefofi.pdf
    • https://247hvac.ca/fabulous1/uploads/files/xamaf.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096638245eec---barurisanadexubiro.pdf
    • http://dblbtech.com/userfiles/file/48857376184.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdba029997---61989129257.pdf
    • http://bestofbeer.ru/ckfinder/userfiles/files/54908161112.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dui+conviction+penalties+include+imprisonment+impounding+of+you
    • 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_off0000edd7.bin
687f315cfe227e3caf03f1a06cbed61aa71b09bbfbdf373e5ffeedbf22bb17a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 11244 bytes
font_01_sfnt_off00010809.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10809 16792 bytes
font_02_sfnt_off0001201b.bin
8639921b2a4e9e484b65438fbe6b67b0b8f6ebb56ced471471d46b1b8c4870d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 17260 bytes