Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f507193663a96a1…

MALICIOUS

PDF

103.8 KB Created: 2021-06-27 12:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7409885b60553d6eab85ccdbb6a1d931 SHA-1: e14b43db608b9f83148a58108b51d1257c6a41d9 SHA-256: 2f507193663a96a1016aced545f967a2c50cfacdb371a944d9afd7a20314aba0
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://termofriz.rs//files/20326286850.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607155959d168---wamunotaworufaje.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/25lg15sact1phs38dbhhoqrons/42022752935.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aefcede603e---tofuxunatezibibujomatekir.pdf
    • https://amblamy.ee/upload/file/59979058875.pdf
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/23576905034.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160983d1e04915---47920879802.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ahjk5e433108l1a3epu3qa03s7/resaketeki.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c99a707e5---nalibixotufefuxemozilu.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e0a3d95a5---kozubutuwadef.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9453172ef---ripiravadagijerune.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc26909201---xutisolodetibidiwevav.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607146d81f5f0---nuwiwasabepegiduji.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/o4uvlibraefp5gnd4lm8o67kmu/sazawotenosuzosamumoseb.pdf
    • http://xn--szabowski-tub.pl/userfiles/file/66690937137.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160826f51e0f15---17211428144.pdf
    • https://eminencesolutions.in/resources/userfiles/file/11711370847.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76b6d91d9---lujelusila.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/pu5jlqvpbis8s4hrh971nckkdn/90298828914.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f74c051598488b7745d92b90ea2a35d6/pugop.pdf
    • https://transit-connection.com/userfiles/files/95438356588.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/b9f4d16686b10693b25321afcc6da5e0/68576724830.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aff080260---jujugonop.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=who+wrote+psalm+118
    • 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_off000130ec.bin
956eddde92871bc21f0b3f9f5e3c40c6c32cded6888064bd740d5f874be0172d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130EC 18656 bytes
font_01_sfnt_off00016188.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16188 16792 bytes
font_02_sfnt_off0001799f.bin
d26bf7293670a6cb2b457b9a5c888e1f524c5ff7df49337e3018a3e9bc921d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1799F 10660 bytes

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