Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62c26917dcb920b…

MALICIOUS

PDF

87.0 KB Created: 2021-09-17 21:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0319c1afd5fde214c8d69e5e61fdaa31 SHA-1: 904dfa16a76d9fe733899afc001805841b988032 SHA-256: d62c26917dcb920bfdb97180c386a483c2d90d1d25e16f437d4c1ecf5dae1417
126 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 large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a probable phishing or malware distribution scheme. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=android+sort+apps+by+install+date
    • https://ahl2005.com/ckfinder/userfiles/files/lasimodivasonexawesatuv.pdf
    • http://ciaomamma.hu/editor_up/zubub.pdf
    • https://clearpatth.com/userfiles/file/figakexuze.pdf
    • http://centroolosprato.it/userfiles/files/suxubuliwoku.pdf
    • http://pdww.ru/ckfinder/userfiles/files/sidutubasosajedubefozi.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d2fec78bde9c500fc44607eaf25ea19/pulolorogofapobolox.pdf
    • http://besteva.com/upload/files/741331770.pdf
    • https://www.nevjegykiraly.hu/userfiles/files/rakezem.pdf
    • https://m-isc.com/userfiles/file/dixelobesujub.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/66a82cd3d8e0728c7eff53147b0c6910/57904893665.pdf
    • http://www.somdattabasu.com/fckimages/file/kiwogemuzugudaz.pdf
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/98821216737.pdf
    • http://ocvitlucky.com/vietkiendo/upload/file/63192102313.pdf
    • https://www.renouer-auxerre.com/ckfinder/userfiles/files/91458207744.pdf
    • http://orderleesushi.com/uploads/files/71193287141.pdf
    • https://conexkarvan.com/cache/fck_files/file/27070373622.pdf
    • http://pharmabiosolutions.com/filespath/files/20210906041621.pdf
    • https://kingwaterpure.com/ckfinder/userfiles/files/46881533950.pdf
    • http://aan.kz/ckfinder/userfiles/files/58504200840.pdf
    • http://marchmont.ru/imgs/file/2052159818.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f5.bin
28f61838c083d14eb9d8a1e22c90c442c33291e2441898a7d4891fb2c4938951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 17168 bytes
font_01_sfnt_off00011e5d.bin
74e05b6596ac34e7721530b6fe61bfa6fd97e0dbbd8ac1403627bfc10c76c6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5D 10620 bytes
font_02_sfnt_off00013694.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13694 16792 bytes

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