Malicious PDF — malware analysis report

Static analysis result for SHA-256 7003f77424976fae…

MALICIOUS

PDF

74.3 KB Created: 2021-09-03 18:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea132e59a5fd0be1d9c1aa37eff6eaf5 SHA-1: 2f109df1d81c2183e5324e1506fa8d61f1de1d53 SHA-256: 7003f77424976fae671d8a8b809344e7d99fec6b1eef885641e07be3c13a833c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many hosted on compromised WordPress sites, directing users to download game mods. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/uplcv?utm_term=gta+5+lspdfr+online+download PDF link annotation
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5a8a4838---80124087611.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/fumiruwuxututelep.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/92512232012.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611433ab65cb5---87569408851.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210531235930_162751892.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/17392722672.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770e110355c---25226681161.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/70308819474.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77b5b50e31---punagujubuvikalunan.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/tojiguloba.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/65536597381.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/polagikedusufaponidamux.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16071f7dec6f71---kopavidoziwomab.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/63204069170.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/delaxaniveduxiduj.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/xotaluxinubadajubibome.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/lefabumolatasofudomiv.pdfIn PDF document text
    • http://bwc.lt/i/kevotejozitanadekum.pdfIn PDF document text
    • http://shesob.com/file/files/98535140149.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/gowafos.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_off0000befa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 10748 bytes
SHA-256: 7369f5a95602c24416888c2b3e4060979b1d4ff0301bbfa31ae88d8970113e9b
font_02_sfnt_off0000f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 17108 bytes
SHA-256: 88782aa10416407d54b6761144efb155c8794ce0e6d85335aa5387e1dfbbb79b