Malicious PDF — malware analysis report

Static analysis result for SHA-256 e046c8bd93f69480…

MALICIOUS

PDF

86.3 KB Created: 2021-07-15 16:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e49569ceb1645577cd18000a0eef34f8 SHA-1: e670feb752040ad447c0c77e8f331bcb9bf19d6c SHA-256: e046c8bd93f69480cd100438b266b15a099f969e9bf9b5456e7dd69e4d1892c7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links are likely designed to redirect users to phishing sites or download further malware, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f16844d8c---48562082908.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/12551686574.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e6adea65971---tajik.pdf
    • https://webornate.com/viking1/uploads/files/4328060844.pdf
    • https://cometsecurity.in/admin/userfiles/file/57865379610.pdf
    • http://dominoliberec.eu/images/file/files/rogijevebimesukepovoxizix.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609264f0386ec---xoxowekuvip.pdf
    • http://vzwsportenmuziek.com/content_docs/32474926722.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608987ac6df31---ruxogoriv.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10ee15736---dejava.pdf
    • http://mwflower.com/upimagesfile///52734155113.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/9160865727.pdf
    • http://grgct.com/ckfinder/userfiles/files/tiradadetejizulapow.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3e99b8280---33199457190.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c83afb86c07a30002899cf0ea8cbd7c4/xizovomijejapewoze.pdf
    • http://svaz-podnikani.cz/files/file/52149208727.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/351980241.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/801b702d47199315f4495c426bf138a3/deziwusenerem.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3bm4njsj3cu9956ffl05ehrm21/61218424884.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ifo4qko424o0to90mlsvvh3493/sapumawo.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c259ed9f2cf---62104355984.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8331f9c99e358b9301e6cdcba2b7d571/titigapijokutim.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/1284798f238892564025d145b021609e/962590505.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/bfd50dea868dedda135ec1aecf8b0a8f/57822740248.pdf
    • http://short-story.ru/upload/file/52601121013.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=to+cast+aspersions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02b.bin
85ea752118e9ab624d7c9530b210cd8a0aae9e22be017d0ed3b3ae9b9da3b3da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 17180 bytes
font_01_sfnt_off00011ce2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 16792 bytes
font_02_sfnt_off000134f9.bin
2b72aecda4d7212f684137a70f8af14c4fae52eb7256f0f8cfdbe20b5fefa3d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F9 10284 bytes