Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e574c670b5bb6e…

MALICIOUS

PDF

71.0 KB Created: 2021-06-27 01:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 995c085366119f7dbf1ff67e25ce1572 SHA-1: 591fd7a91bd9174e0586fb2ba167e801d9cb3fa8 SHA-256: 60e574c670b5bb6e192f85c94c7131f2af217424e8e30a93f4622469d22bd42a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm pointing to compromised CMS upload storage and disposable hosting. The embedded URLs, including one using an IP literal, likely serve as lures for phishing or malware distribution. No scripts were extracted, but the PDF structure and heuristics strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://southtours.com/wp-content/plugins/super-forms/uploads/php/files/p43l2l9u5urgp9fd09455ijk2l/95105164897.pdf In PDF document text
    • https://associazionedynamica.it/uploads/file/zimatax.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/wiwekonabeti.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/85864006004.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4db81d035a---25167974921.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e0a6c3977---46034272698.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0ac77ee01---84129557701.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/sukagaxupebujomanezugeges.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608202c32919d---tuzekafatibezal.pdfPDF link annotation
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073198a00b9f---luzumaminojodowedatidaba.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f377ab30a1---17438598175.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d684dc520e8836955beb1c53c34c6b35/88297835184.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/lotamar.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ac1122272554b6913bb07e94291b515b/36667401634.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210604_FD5C6C3484926CC9.pdfIn PDF document text
    • https://noddy.nu/images/file/78862818361.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/ditevowujaloselobasamujuj.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6e8041b16d6a0e801087123b6020aa46/zibiletun.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dc3327b6e---97622630357.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/73418946806.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/razufikaxujodowap.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c998822c8---lixuguvefumiko.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/90617782956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=large+numbers+class+4+worksheetPDF 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_off0000b55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55A 11040 bytes
SHA-256: 03448230e729056e6a53f584d7ad541ca130006ef21745651ac2fca433ad3a65
font_01_sfnt_off0000cefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70F 15876 bytes
SHA-256: d5c35fc5119dd5d2d15b869df09ee78dbe188e5b7c3ce329b0198a068862f630

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