Malicious PDF — malware analysis report

Static analysis result for SHA-256 2420604e3a31610d…

MALICIOUS

PDF

117.7 KB Created: 2021-06-29 20:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d63690a0b24bddc86e879a5d44f40e2c SHA-1: f0ed24b5b4d6920b43ff6c89b1bb8133de4e267d SHA-256: 2420604e3a31610dde1144bcd0df468050c101cc5e3797942c141255887d63ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple PDFs hosted on various domains, many of which appear to be compromised WordPress sites. The presence of these links suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f354d0286---nujusabotuluzaterefitig.pdf In PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/5b09eba1a51573d5fb011331c7a8a640/92821908392.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/veponupidinebipolape.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/24351472724.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/e2bde74e527d577798f1bf934b68d1b6/xoguxa.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/dudajeret.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/pidofudogazebuzu.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077908facf86---fuzuzatazisokolabusazogo.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/4f571bd18aac47d25e7f64f384ffa181/35901523841.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/a748cf1da4337faf08f2b9b38b5c5e97/7186566851.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/503e44eb15599d4aa3ebf1a067a9449a/76792554615.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b206f9d39a7---83639116560.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d650acad284---89762622938.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/14178198885.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b024fea9245---98942439651.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/be9b4f98dee870d0bffe2905e5fdeaa6/wigepakaxi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/alrninht6irh9hmllmpbq46kun/43290948556.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/natolitomu.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vpc6udr9f867l2hgboa2vv1cfl/riserekazitenebufovugiw.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861be89edc1---natuvav.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ccdde18c0---11386805285.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc856fa65---9736711023.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/vrpp7rpltsuk8srtqi857928o4/dewuziju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=babish+chicago+style+pizzaPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18062 18908 bytes
SHA-256: 4553c63beac1c629bed81c60318050cd2a5e0f7cbb6f33a0061445800600a668
font_02_sfnt_off0001b0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0D2 10816 bytes
SHA-256: dfb1648f92440870a57914769857d87e7a3ed57862d7765f88d2ec03cd47e3b6

Open this report in the interactive analyzer, or submit your own file for analysis.