Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e1dd0220776f25…

MALICIOUS

PDF

83.0 KB Created: 2021-09-21 04:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d26f9eb71ae2b0c288c8d4525cf89cba SHA-1: 164a9065395053cdc230953661a3e15f9a40857c SHA-256: e7e1dd0220776f259dd0250824edab4967f6b9de2aaa368689fa3eb22a4c80c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=best+apk+for+adult+movies PDF link annotation
    • http://npi-management.com/ressource/site-image/files/gilotigavo.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/jisefilorivirupabopawu.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/49869801161.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02adaf409---buwodezodipu.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/fefovonuwuku.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/bokus.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210906202352.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/27448215407.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/vozagoxanu.pdfIn PDF document text
    • http://strap.sk/uploads/files/bowejoduxupebif.pdfIn PDF document text
    • http://www.tecnobor.es/ckfinder/userfiles/files/48503491281.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/74196903620.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1614007d396db1---80003023339.pdfIn PDF document text
    • http://maremania.net/img_pagine/file/sogaxavase.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e38d66de484aed40c30772977f35e42a/69994028446.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/zagoj.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/79131581572.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/pewufufuwami.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/nemofukivokejelali.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/fiwojizatupelo.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/34928149427.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/13651338140.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/bezilobanewupo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 10868 bytes
SHA-256: 3cadd6fb5432a74c4298e51fa7128d2ebb5518ac8a33dc97d55bb2435d032f60
font_01_sfnt_off0000f829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001103b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103B 18032 bytes
SHA-256: a83df97d68a2af2aeaa67b38c89a15b535733beb6310cb99fa79d34a6925db5c