Malicious PDF — malware analysis report

Static analysis result for SHA-256 046ad7e7f12f4a35…

MALICIOUS

PDF

84.5 KB Created: 2021-07-06 00:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 03285d843a5e0baf7c66799819279928 SHA-1: 9dd9efc14f04b445f82791d725664a9574b5e4ae SHA-256: 046ad7e7f12f4a3573dff663a6a2b8aae1dfa36372772369da12293cd590fbe3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The primary attack pattern involves luring users through a compromised document to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=how+do+you+get+permanent+marker+off+of+skin PDF link annotation
    • http://star-transform-moscow.ru/uimg/files/vuxozirovajuniz.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/bf3f90bb3b1587d3cab37496b4c93a57/25264435695.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9d2b3589a---26136179617.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/46598301262.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/rog4efd11rj4ms9qjcdnsmbph5/45525421192.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c85448f0a6744ae25c33ce8d70c21b49/bawojadamumixivasoxalosab.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/zaxaworamixim.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/50511895372.pdfIn PDF document text
    • https://webhosting4.net/media/file/48664974004.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/26522562755.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/77910339927.pdfIn PDF document text
    • https://inncredel.com/uploads/morufifux.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/a48auin30c1vjd0s32cat1onoo/zipaxuxip.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/rivumemiteboxuwikevexiku.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/55337712017.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a64b4a25c---mozab.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42fc69693---57065046770.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/a110f1bdfef90e3db709c9232e5da219/xafaremimopaxerotu.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/q9v71fsnt19nh77leugk7610pa/13513416674.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/91612857739.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e82fdb070c1f16609a5d1ef0fc9e931d/72101362776.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/ponijevemibopowo.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/9046c31c2647b36e3f040255c55b9138/sozoviwikixavusan.pdfIn PDF document text
    • 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_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 16468 bytes
SHA-256: 72391a2feb6eaa0cc1237e82b8ddd1c530479ba5485689b14252a645effec30a
font_01_sfnt_off0001125d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125D 11180 bytes
SHA-256: e9df226da10f392fb667b6d09de9afda62348e2a03ab5eead83cd78bc563cb11
font_02_sfnt_off00012c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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