Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bf4017b83679cf…

MALICIOUS

PDF

82.4 KB Created: 2021-09-11 20:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e4cfe33ffae0baaf6b2185b1e9461efe SHA-1: 3f0c6770dc4b3f8a385f8917f80f65d365aceb84 SHA-256: 47bf4017b83679cf5f01f76c7699e6269f9da8b968c4a144c2cfe6bfae53e854
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. The PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://parvazyab.com/basefile/api203/files/zinerimi.pdf In PDF document text
    • https://manhalhealing.com/userfiles/file/4759548005.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613141180b57b---90352018730.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/55003050338.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/nojemisisowugutuz.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/ximizanulowugiwef.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/59324780324.pdfIn PDF document text
    • http://edallyshop.com/upload/files/50746961056.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/kefewegiwigut.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/10569658219.pdfIn PDF document text
    • https://vitanov.rs/files/27427106802.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/rutujalafosag.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/zewuzewadafajipufig.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/rotitavarumavipexow.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/68774701332.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109071058086855.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/podovijavazuwet.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/jarewo.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109101204097707.pdfIn PDF document text
    • https://gestcargo.com/uploadfiles/file/wotazakamaruwifipijajeno.pdfIn PDF document text
    • http://parilka.by/var/upload/file/josakanogodaxonatudafaj.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/milubogowo.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/14568534521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+mark+of+athena+read+online+freePDF link annotation
    • 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_off0000db12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 10508 bytes
SHA-256: b81dc7ffb33d3a389579f881aa7cf8959c9e56df759759a4f41b06ace7e7a633
font_02_sfnt_off00010acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACF 18624 bytes
SHA-256: 643bb4b4426838b4edefae89c992f7c3f1b994d7f5531afbe6bcd461511f6e9a

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