Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede9f5021e5ad387…

MALICIOUS

PDF

79.8 KB Created: 2021-09-18 13:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7b7be0f5df463dfcce67530d51c76f5 SHA-1: 0f6839d3778a18fdbe10065d593ea65f942f60b3 SHA-256: ede9f5021e5ad387ad6cce3586bb3d0e8a8a3aff72a19011376ca54a60fece8f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Numerous embedded URLs point to potentially malicious sites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with attempts to redirect users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://garglob.ru/uplcv?utm_term=moviebox+apk+2021 PDF link annotation
    • http://longthinhphat.net/uploads/files/vavavesuvolep.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/32121241973.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/rivuxex.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/lerelewazatil.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/bigisawozibawebufijunixin.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/repovajatajijurekox.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/87818771574.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/dc6f10401d6ce55db830405d8e5af0e6/87465751269.pdfIn PDF document text
    • https://laps.pl/userfiles/file/teteko.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///muzimokenoxupexoxumolove.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/misiputiw.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/65145964642.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/72450021467.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/5513460258.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/51214297403.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/66098965550.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/16082069157.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614410c089500---mudubuvebin.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/zasovotawezun.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/genepujuxipela.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/mekodozi.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/votoditemavinef.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/vatekudiw.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/64578643598.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/57238010525.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/burujizorijibajajelamerim.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_off0000d2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DA 17960 bytes
SHA-256: f69a88f776ff5c24c33cda931085f8075387cf8cfd8d5416f7414b3573252e2c
font_01_sfnt_off000101b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B2 10416 bytes
SHA-256: 56a9db530447f0dd696419df2e1e99209816bf12387a2f6788636bfb9a9491ab
font_02_sfnt_off0001194b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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