Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea985a6d236f2e5…

MALICIOUS

PDF

118.5 KB Created: 2021-09-06 12:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 671bff4f8d87651058bac58d3932ddb3 SHA-1: fd7d9bce56f2872c02919688ed110f70f863cf75 SHA-256: bea985a6d236f2e5d58c87ac1c530107a517733a350193a4b00158032bf9a96e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://krisoc.ru/uplcv?utm_term=japan+visa+itinerary+pdf PDF link annotation
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8040532295---4003998726.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33864d6b63---gotusubojazosemuzizaxewor.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1f99576c0---29055299770.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/40021531640.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4766ee6cc2eff4377e71499ce318a47d/junefipuzolanefakuvotoj.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/xuwobobakobilone.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/guxizibi.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/848928fd78a478cb3effbbcd35492755/vegamafo.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/40882151608.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/todiwozujidumusog.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/37403093598.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/savafozigiwowifufowamugat.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/125a2f4f16c6800b9f5b17aefc53196f/mofevosepafovolefe.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/warefolutajipipisamaga.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fc1b14a56---tesogerafa.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210706_7B825EE18662788F.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/bf335046f00918744e2bed7f6de85263/lelup.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b70748e580---tivuxopiv.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/kilarisuxale.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/hadspjdmo5dbv370prge5mfcqr/22739080238.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/digunirovuxezoko.pdfIn PDF document text
    • http://beateromer.com/bilder/file/11921915566.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/pavavojutudamazumapupe.pdfIn PDF document text
    • 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_off000164cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE2 10496 bytes
SHA-256: 0046b4e27c85e295771cbf8a3e1618c4b7053caac3589b652e14fcfb6cb7aa0b
font_02_sfnt_off000194f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194F3 21144 bytes
SHA-256: 5eed71f9c53486ed1f179655212085058596a81acb04d0fac77ff51aa720d47a

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