Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee62a5d5e4bd1b4…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 20:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bef626782955017166b5f6a248ee34f0 SHA-1: 5a225f6ded60104c521827244b7b47287b58cfad SHA-256: 1ee62a5d5e4bd1b4de5353a28556c86c876b092dfa91a3c939c38af982686e78
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to external resources via a link farm, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe914d62d7---jikujejesanujikavimez.pdf In PDF document text
    • http://allaboutdowney.com/userimages/belozudolizakopepigipu.pdfIn PDF document text
    • http://gtshotel.it/images/file/9451449713.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d66aaded9---45196606742.pdfIn PDF document text
    • https://unosms.us/userfiles/file/jebanobelazibomu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85b726253---90166105161.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/f9be1febb9c36ed11709eaaf73477085/xazujowaso.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160989eb94618c---seresujadidizud.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/19896258890.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/b190brjfengfmpd7hpb7j5do4m/14796520151.pdfIn PDF document text
    • https://isleo.com/i_photos/file/18252611058.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfc5ee54b---kepofurafibogijukowe.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a97adce2ff2---39754973615.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ec2275b4---vizunalijo.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/73385132928.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160715175483ac---26437219910.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/aanj5jdidnv9nhnspf05aipkj1/vokaratezovirogubi.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a21a096be53---bulelilejimuduzepumen.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160749b77c4355---zupoboroduxinimalevit.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/61383a62378d5597be18442773d4c943/12983096323.pdfIn PDF document text
    • http://gardatrans.com/content/Files/zurilarunubi.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085eb3d709e4---nesizazavaxesakefidepipu.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16094cd0630d71---69168675820.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/cbf30a90a35a71f6e90e48f87d626cdd/zivavijevavatijal.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/huq490fuo7rdn618fjtnrmmq8l/watomovezipamunupomapin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=minor+losses+in+pipes+formulaPDF 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_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 17468 bytes
SHA-256: a8559c20f5b64e06692efccfe35ae34e2bfe86416b2b88418990c0e2b0ba6d0a
font_01_sfnt_off000118b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C9 10512 bytes
SHA-256: 962115e3922ff524f5111631f9e5f9fe7a4fdcb41c87d16cd2fe88d06862bc7b

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