Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e974f2527b91281…

MALICIOUS

PDF

78.5 KB Created: 2021-08-08 23:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6aa6a2e8eb9e56cb7bc1c97dcf0c9673 SHA-1: b41c9ca6f40255d5b9e63eab9e91edc966b52581 SHA-256: 9e974f2527b91281251d5bdb3054de16a8fdc865bed065617119ca7d5aa2d2c6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to these compromised sites, potentially for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/bjbno1ekj8qu4tu0g9kd8565kt/21577715547.pdf
    • http://food-cloud.com/home/food-cloud/www/site//site/data/files/jezudazodelit.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9c1bd777d---damagikewibuwiduxewagurad.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/a276b1fc9d5d5b4986f2a9852cd46bf8/1952135464.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609c991d68e4e---mimezuraxoxagawu.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6c625d8723---pasopesotonutesenafu.pdf
    • http://4seasonstours.in/userfiles/file/dapivum.pdf
    • http://kunjipsc.com/uploads/files/dodifasikuduviwijawusowi.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/soguriruvilavakaromipi.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c73f157be6f---61183541593.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c2c2a6ad7---runaf.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/2ddfe0057a17e17aadda8aec0d2eee03/57230351999.pdf
    • https://astek-telem.fr/userfiles/file/40344103356.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608f67e0c788b---46010829321.pdf
    • http://constantcontinuity.com/membership/data//files/naxemabugefi.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e410ba9795e0abfbfbe02455aa8af781/74395160780.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/c0878c91f912552d2959438574957032/59008283413.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/14c2653ab1a4f452984e2ff0ce07dddc/jiparavukudupoti.pdf
    • http://gryfarmerskie.pl/pliki_wyswig/files/mitevaxivopuzukamexe.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210605_789C746D727AF9A2.pdf
    • http://driver-jazda.pl/upload/file/solax.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888e47964fb---8733340146.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mo%27kalamity+we%27ve+got+the+power+lyrics
    • 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_off0000c506.bin
e9f1512463f0766ebe6ec6517454c9a2c457112d785a7ba9ea31c015fb9cd8a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC506 11100 bytes
font_01_sfnt_off0000df0b.bin
ebefaa1ab104ebea7bf90339f8b4c47e944884003a01f04f2111097a7c78895a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 20820 bytes
font_02_sfnt_off000111e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 16792 bytes