Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e98f5c79535de50…

MALICIOUS

PDF

68.1 KB Created: 2021-09-10 21:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9736d56775439bc43654600b762368cf SHA-1: a23ac649a400c3229c9d90650a61f70a9235b501 SHA-256: 7e98f5c79535de50f6ba44b09fd33ea36a1669b468e25dffd6b5a9ba07b9dccc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://wastran.ru/uplcv?utm_term=tae+tv+apk PDF link annotation
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/703bba55aba254d69e916feb1121e355/54575331768.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2c2644d81---33183028819.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/43527077494.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/8612508084.pdfIn PDF document text
    • https://sitarasign.ir/data/file/91263741184.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/24088355903.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/69475767912.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/jirezigek.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/disijuxebot.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/7752612791.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2b58738afee8f5e51275499ce4261a59/pekudonubefe.pdfIn PDF document text
    • http://villkasz.hu/editor_up/fopuvorizukorasixofoxo.pdfIn PDF document text
    • http://tcihk.com/userfiles/29043232671.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/18466178136.pdfIn PDF document text
    • http://potlista.com/file/files/27200206128.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/9158098972.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161354e636630b---babebutedafumetetefen.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/11162563919.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/66370902288.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_off0000afb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB3 15068 bytes
SHA-256: ebbba4f6a1b36e96d39eea768cd1a06874bd16e9d3fa04df907584d138b8b509
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 9736 bytes
SHA-256: 79ae54d6a354ed9d7b3257f127777acdfb0d025abc15b687a69302c831033fec
font_02_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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