Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf1faf71d9ae993…

MALICIOUS

PDF

203.4 KB Created: 2021-06-29 03:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5de2c4e9a8a293ef9e6be038658a590a SHA-1: 978eaad5b90d898dff38b707e284738f0ad5e7a4 SHA-256: eaf1faf71d9ae99345dc9e6dab4b49556f240450c02e0b76fc76d892ffff6ea5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it contains a link farm pointing to compromised WordPress upload storage. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it is designed to lure users to download further malicious content or engage in phishing, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0279db247---9220985228.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071052808f47---dokud.pdf
    • http://mastrodibaglio.it/userfiles/files/6893328681.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c102302787a---jujukob.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/7iihnslfchplr7fi92tq5vfupk/bafixojojevazopefovofonuj.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b4c4b3ed2---nezoj.pdf
    • http://highgaincomposites.com/img/file/2021625171911.pdf
    • https://rybczewice.pl/userfiles/file/vazagefomeredimazipewo.pdf
    • https://fullgame.hu/uploads/files/kefurax.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ad6c80f4---lofujetanalexuvimig.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/227a1e56526599bcf935a6623c60b5c7/gadotut.pdf
    • https://auto-rujo.com/images-editor/file/zaxalufuzejidivezasakuzew.pdf
    • http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/xodigotavaniju.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b76bb221---53499184253.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/72d0029fff6f23e3fb6c9923b6aadc89/31364891704.pdf
    • http://familiehollander.nl/images/uploadedimages/file/3752063008.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/21891915087.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d09ae8b11---fanab.pdf
    • https://hogies.com/includes/template/uploads/file/236713324.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/1ea7e4a3a54d4dff0d7b6dcfd5bcd57d/dukowexakerarogetin.pdf
    • http://greaterdeliveranceministries1.com/clients/61527/File/rapojamuk.pdf
    • http://altelaw.com/uploads/image/file/7569107775.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/rl3q876acdhig7h0ncof41tsu3/galamamafubibitiwugesap.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e7c489d3---fodur.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=story+of+luke+in+the+bible
    • 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_off0002bc1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC1B 16792 bytes
font_01_sfnt_off0002d42d.bin
9d11eb9784982418f7f67d7bf507511fb04044e1e09f30fef2a7f1bd742e4f43
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D42D 19904 bytes
font_02_sfnt_off0003079b.bin
2f4e71daba25e3698f0afde01332aa505d9301e83c36e85b4a01105de8baa6d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x3079B 10504 bytes