Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ee5ce8e780d552…

MALICIOUS

PDF

87.1 KB Created: 2021-06-18 11:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b40b2c6a51656468abfdc63f3319446c SHA-1: 16d3162ff49d6149869f6c5f8a13c53201c52021 SHA-256: a0ee5ce8e780d55242f7a07dd79985bd3a94b52619ee28513839da4929c7f494
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users to phishing sites. The document body, though heavily obfuscated, suggests a lure related to 'transformation makeover', which is likely a pretext to disguise malicious links. The presence of numerous links pointing to compromised WordPress upload directories and disposable hosting further supports a malicious intent, likely for distributing further payloads or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://winfielddeli.com/ckfinder/userfiles/files/67313790282.pdf In PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aca054ddd29---kuwojexoranopefogibi.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606de7bbc6d71---25324660073.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0e8d3a9eb1b88482e3a3542869af6f00/46450092459.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fdv9tdjb7ans7b31nd4i1aceg8/813503187.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/21uvdl5ob7c7d5nepcdvauihnh/galexuxotepomugawitagesi.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/5a830b3ef63d09231b4a618eb309e9e3/juvuvawopipifabuj.pdfIn PDF document text
    • http://lyshiying.com/d/files/17583855825.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdb2b7612---folebanomigogu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160724f9bc3454---60848406813.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/zibek.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607133856bdc0---89066501135.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160755b37054a0---zaxipogo.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/83431330733.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb85086583---37611747950.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869806152f8---gelagenawikegoxupaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=boy+to+girl+full+body+transformation+makeoverPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 4328 bytes
SHA-256: 007eb29a728b5ecec51057ad69f2579600baab043d3f996019f94d0bcd9e18fd
font_01_sfnt_off00010633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10633 5644 bytes
SHA-256: 4945e4d24152d35ce87ef046bb60f41332e5d468a6e37497aa7c0465ddf6b998
font_02_sfnt_off0001195e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195E 2488 bytes
SHA-256: f00c5202df37c13494567367169687162ecbf9aff9b08443b569dad181b38137
font_03_sfnt_off00012429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12429 13176 bytes
SHA-256: 4d457e8185f05f30a1ccef14c960fa7c154e2c83e9476eadaa17ce9905d8aa04

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