Malicious PDF — malware analysis report

Static analysis result for SHA-256 001c057768af58f5…

MALICIOUS

PDF

80.3 KB Created: 2021-09-03 11:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0abaa185aa02a34aa40c0eb9a1bf926a SHA-1: 38638294976b3a611af0e0a8ce46eddc902dbed0 SHA-256: 001c057768af58f5cc7e1c4bd7dd6eb3e005c74b55dd7d6f09f195e322be8b04
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/393335fdd0a652801f7251c8c3c9ed93/48661496955.pdf In PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/69896300789.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/240314f210dc99e2bd6807f5479a3da8/95829332281.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/fiwuzabibamaputoju.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/94939720034.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/84775793151.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/webefebibuke.pdfIn PDF document text
    • http://grotech.in/userfiles/file/41691667879.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/76580761721.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/8b7b196c8de45e9be93ed20fc446723f/bokuxumitazasenurerugi.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/warefomoni.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/danokozijuzeruzejobise.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/zokisob.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096d08fc1df3---73313603201.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c196fe48a5a---likilemakilarewinupap.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/37884445667.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a1ed2eae7c---sagagufom.pdfIn PDF document text
    • http://canoeing.by/pics/files/dopawamuravezegozilavugat.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/57044667761.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210626010501.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/sisuporejaxomabinidowono.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a78c188397---wakuwajapomekemifunewe.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a47b0dd77---53663567075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=toyota+auris+touring+sports+2013+manualPDF 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_off0000d505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 11108 bytes
SHA-256: bc38a68726f5d532dea612a50e7602551ccdc89728c2f7443a61772fcfb111cb
font_02_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 17352 bytes
SHA-256: 3b75e22cd39f2de74aa4d36c6de40195cba044898d9d1cd29630c8d33dbe9c29

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