Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f5e3bf59bb4049…

MALICIOUS

PDF

99.4 KB Created: 2021-06-27 20:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 465518d4ec1374cfb4a2deed64044aba SHA-1: 22f0bc558a5fe2bb5a80fbfd236e0fc3c566234a SHA-256: 41f5e3bf59bb4049b0fb026515a5296d51f9c9e5362adafa7b9c665c968d1985
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links and the high confidence detection point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://chcial.ru/uplcv?utm_term=pain+on+left+side+under+boob PDF link annotation
    • http://mashtalkandil.com/userfiles/file/jonepoj.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/47119594525.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/187edc799b7897f1dfdaab4663ad7ed8/vitum.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/7rq32hclhs12v9su3eq0geo83a/vevinadeduvavexaxe.pdfIn PDF document text
    • http://apsons.eu/files/file/rasojopekaxotamebegad.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c50c427524---14401457390.pdfIn PDF document text
    • https://papiratisk.cz/soubory/93253023262.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/394b42b8f2c72f09b8865006cb9fd9fa/nedopalefabokoparako.pdfIn PDF document text
    • https://blogsma.com/files/dokexidomubufe.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/4789386463.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088531c5752a---siwufesazokolaxis.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/41655477884.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/22823895308.pdfIn PDF document text
    • https://biocoils.com/img/file/tofedefefubuku.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/19ef1f9f9e140787262e991a010b1086/wukejizewagijizugo.pdfIn PDF document text
    • https://htchninc.com/d/files/64963314925.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/vv4ai9copra4j73f6tgglpmdu0/lawuwakufadelirilinukunut.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763cbf4911a---77742151262.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/vu3g765lrocjjm0eue1mvdkgp5/73818987012.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/desobeleg.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ae101bc340129299ab5345dc0c14cb30/84825032608.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/nomotiganina.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/mopizuxowirafodumu.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb96ac1841d---renomadabaxuv.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf58151ea75---fonojiv.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/65802789591.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_off00012197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12197 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000139ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AE 10588 bytes
SHA-256: 046f1c195d7f5b01bee2be7009b3280808c2ee6dcb44091b4362d4f37bfce869
font_02_sfnt_off000151f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F5 18628 bytes
SHA-256: fdc3caf864b13415466a53ef30221dd8b4d4fb39299669eb825cad3244b1da39

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