Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54003350e1255a0…

MALICIOUS

PDF

79.3 KB Created: 2021-09-18 14:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ce367b7989ef768a58dceb91de03d884 SHA-1: 32115d41813fe6908410ef5e9b1c04e4a9f24f64 SHA-256: e54003350e1255a0f17c896fed4c1ed06ffb068353aa20ba7cb7003577bbebbb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external sites, indicating a likely phishing or malware distribution attempt. The PDF structure and embedded content suggest it's designed to redirect users to these malicious sites, potentially as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://archism.ru/uplcv?utm_term=lecture+epub+android PDF link annotation
    • http://bluebiz.kr/userData/board/file/medetafuvasinit.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/10857920666.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/19420138314.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/67681492537.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/93476050374.pdfIn PDF document text
    • http://mayjack.com/upload/files/75302685412.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xojelelaketuwewi.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210918_FA5D87B41AD58F00.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/27013599391.pdfIn PDF document text
    • http://snft.ro/media/file/rovevurobilagegitizaji.pdfIn PDF document text
    • http://lblussana.it/images/file/wuvep.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/juvagidiw.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ebf56f490---10586789398.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142b813c7762---23008886189.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/48507780447.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/3353872166.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/dasalivonizurefudomugonim.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///zolofemikeliwasisen.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/xemibomapabu.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/93021821792.pdfIn PDF document text
    • http://okvin.org/userfiles/file/nafotodonaxorudigokoleb.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_off0000d1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 17872 bytes
SHA-256: b6c9f92437f6507aa857fdc4fa1d8a8b4e842ef5229b9d255d67a22b0c639919
font_02_sfnt_off0001184e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184E 10488 bytes
SHA-256: b540e065a21310f06ac1edd04cc0629cc42ba1602eb8a85b7b0eae7d6f543803

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