Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbfd099a1193fc0…

MALICIOUS

PDF

62.2 KB Created: 2021-09-07 04:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0346e3b79e89566e45dbd7ca4252775a SHA-1: bf592c6b5178993a2af49ad090ecf0eddb6e1029 SHA-256: acbfd099a1193fc00024dead3a54170e0e01eea6542633657d1f501ed204dad1
154 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. This behavior is indicative of a phishing or malware distribution scheme, as suggested by the ClamAV detection and ML classifier flagging.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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
  • 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
  • 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://playeasypiano.com/resources/fck_images/gesetojogekividenewokesi.pdf
    • https://dgaspcsm.ro/ckfinder/userfiles/files/5730488298.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2000eb2f7c---58194547375.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb98e97f7ed---xulim.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160764039bf0a4---letuzas.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/c3lthld3j4ti4emr3700ro4kkk/81715179135.pdf
    • http://kiavysocina.cz/UserFiles/File/43118362987.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/bb72de570f7d4bc56ad8eabfa630078f/xelotodom.pdf
    • http://pamat.ro/UserFiles/file/vokuzekopajarafa.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607052a7ebd79---nevafobebuzusodorebawume.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/f99b2de14d1c21bb4c6a2b5cbbe9b42a/20819946934.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/budotaru.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2e4729bd8b344dfe96f10dc261362708/fewoj.pdf
    • http://fredericjean.net/oplusco/file/xadaxudikapawotogizupaji.pdf
    • http://valeneighbors.com/userimages/xawiwus.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161060da884731---34121298452.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/33de70776e23ba12dead79e4ab5926f7/wojikofatuf.pdf
    • http://tcurryproperties.com/konadnew/userfiles/file/razumevetulegagunufutod.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16136429fc7a11---23448164252.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089fad6e01a9---lituk.pdf
    • http://www.sun-green.eu/ckfinder/userfiles/files/jenapob.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66fab009f---kavixebinewufo.pdf
    • https://autotronics.vn/userfiles/file/19707660624.pdf
    • http://nktrading.qa/file/files/gojejal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ischial+tuberosity+bursitis+exercises+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd0c.bin
a20f075eb671beb1750234403091ac6b869a5b2984f424b12ab80e0c439d5bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 11020 bytes

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