Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bc7cdfed755ae9…

MALICIOUS

PDF

155.6 KB Created: 2021-06-26 22:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3dea9f6b2b1509976c10bf528f2bf70 SHA-1: 8a56f36a34718eb4cb2bbe55797e0d4d67550c5a SHA-256: 26bc7cdfed755ae9d0e09b37de1ac033ec176b477dd8a49cf25d6e1ee03b5848
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is part of a link farm and uses language typical of advance-fee scams, aiming to trick the user into paying fees for a fake prize or delivery. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://nprofit.hk/userfiles/guxizej.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0fe46eb46---88105864708.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6e9d60456---92405381196.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160790b5cbffc7---91153832400.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781f403df38---25688587617.pdf
    • http://riskhedgetech.com/uploaded/file/186849209860ab346400df8.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/tctme9badefa0o1lejo0gm62n1/73645140975.pdf
    • https://bursac.net/userfiles/file/1382771100.pdf
    • http://globalquestconsulting.com/userfiles/files/pivifekewixugiworeso.pdf
    • http://daming-school.com/userfiles/file/monarodomamo.pdf
    • https://t2sc.me/userfiles/83534793590.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/3a987c3e68f89c521f4502fe7fec6cb7/jufanowipaveziru.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/782b6478e28f10bd00d32aee790372d8/fogoruzepupuwutudotafuw.pdf
    • http://sosonomo.com/ckfinder/userfiles/files/20351919715.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094d97a4c9a2---58657203939.pdf
    • https://toolsatool.com/userfiles/files/pekuxuvijorugagekuvi.pdf
    • https://lensprovn.com/ckfinder/userfiles/files/luwawagomovaxivisidoberoz.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7380c76603---35137376901.pdf
    • http://cesnek-vysocina.cz/UserFiles/File/mafanigufil.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ee3tarkeerrl9mficertqftov8/lonipulumuborowo.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160790bd72b003---kefifokoxebidejixevowe.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9fd580ea---52934899789.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160846a21b6a4a---tukusorapofaxozonotuno.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a2cef4c73ee983671fe1c1d91b0ce57d/jumanumewakiwu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=signs+of+turrets+in+adults
    • 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_off0002009b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2009B 16792 bytes
font_01_sfnt_off000218b2.bin
98bf51e45b18d7b92779c6855ca44e22a4db211b7de4ae7874575e85b73d71bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x218B2 10704 bytes
font_02_sfnt_off00023127.bin
d8067ba773711ce723550cbf399c8616c12e9eee0acc5856ea2201c6d3b3ce0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x23127 18712 bytes