Malicious PDF — malware analysis report

Static analysis result for SHA-256 d107286c3629f542…

MALICIOUS

PDF

87.5 KB Created: 2021-10-10 08:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2684a0e918c54d318cdf7b7823129a90 SHA-1: 8e1f784fa33a5390f81510967b04ce9aae492e54 SHA-256: d107286c3629f5427008c1940fb47b31e324fc294dc72c57bc3579ce35fd22f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to PDF files hosted on various domains, some of which appear to be compromised CMS uploads. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://gandolfiarchitetti.com/userfiles/files/maparoloxezaze.pdf In PDF document text
    • https://nenmongdangquang.com/upload/files/fadonigupixi.pdfIn PDF document text
    • http://autokaryszczecin.pl/userfiles/file/motebazokatebixetofov.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/2a1b0352414218454625dd8690524599/jalanamopeponokudeva.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/kenotokejazudime.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/fudemevezume.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/49783453316.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/94072928597.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/suxajexosolixu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16145e2dd151a5---wopigudedoto.pdfIn PDF document text
    • https://pisausakti.com/contents/files/sasakufomemov.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/3780379330.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/48026741876.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/vojegipapu.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef836e2ec4---33596952152.pdfIn PDF document text
    • http://lesrimaudieres.com/images/uploads/file/pewukatezosodoxe.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d38d23a1---jikelutuxoge.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161304c4ea2cae---80968512372.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/84120ac8fcd274bbf1dfb5526c5f5457/93382668545.pdfIn PDF document text
    • http://keacg.com/upload/files/27571558042.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/fumiporusajidewidutoboto.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/bukaxetaxojadajibipafeka.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/xerusunisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=another+word+for+judgementPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 20328 bytes
SHA-256: e439f3f95780f60b66164772246a221a31d62dcc8127cc9e603291563b3d87e1
font_01_sfnt_off000120b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CD 10632 bytes
SHA-256: 60f73dadb2868839e9792fb7ee6d642bc6f83886700ca8abcb237c572a1438c1

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