Malicious PDF — malware analysis report

Static analysis result for SHA-256 b386a578a8122cd2…

MALICIOUS

PDF

80.1 KB Created: 2021-09-13 21:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 004f3c60bf397db8543e269b5dd6c295 SHA-1: e160b939bb2b9cf1fd91a3fac512f5961c88ddf7 SHA-256: b386a578a8122cd233d2149edb3251d894c47a6ee534993de39ff7b3ba070141
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicative of a link farm designed to obscure malicious intent. The ML classifier and ClamAV detection strongly suggest maliciousness, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lex.tj/img/file/sugifupevakem.pdf
    • https://doctornhospital.com/banglanews24/editorsfiles/files/87946151396.pdf
    • http://webinaris.org/ckfinder/userfiles/publics/files/zaxefo.pdf
    • http://qzgj.cn/upload/file/4431252521.pdf
    • http://glamour-nsk.ru/ckfinder/userfiles/files/29721487935.pdf
    • http://asirakademi.com/resimler/files/tavamizopugewudi.pdf
    • http://groupkaishan.com/d/files/88040836488.pdf
    • https://cancelaria.pl/galeria/file/32718639697.pdf
    • https://vonia.mikludava.lt/images/files/binopi.pdf
    • http://glamour-nsk.ru/ckfinder/userfiles/files/botixaduzazi.pdf
    • https://ww150002.linebot.net/upfile/files/20210904204846.pdf
    • http://dylogistics.com/userData/board/file/mokomejo.pdf
    • http://hostingureitings.lv/uploads/userfiles/files/90354086247.pdf
    • http://chipublichouse.com/ckfinder/userfiles/files/vemiriwusulupoteru.pdf
    • http://webbuilders.com/files/file/malob.pdf
    • https://bor-diing.com/upload/files/4966163938.pdf
    • http://wolfroccatiassociati.it/userfiles/files/dosuzowixovoxaso.pdf
    • http://oishisushigd.com/uploads/files/95895459770.pdf
    • http://kazuma.ru/ckfinder/userfiles/files/61222522910.pdf
    • http://bandbaajabarat.com/ci/userfiles/files/mugogepogebiro.pdf
    • https://mimpishio1bet.net/contents/files/kopun.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sultan+2016+movie+watch+online
    • 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_off0000d2ac.bin
7c79e2527fbf6fca505716a3fd6c1797ae4346b3726e935d1225fc27336a3d62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AC 11016 bytes
font_01_sfnt_off0000ec43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 16792 bytes
font_02_sfnt_off00010455.bin
f07fa712c29e96f7132f5921b9ff658709764645825112a27feb4bb6a52bbecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 17952 bytes

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