Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ec0d914007c1bb…

MALICIOUS

PDF

89.6 KB Created: 2021-07-22 12:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c19b02bf6d62526a20e9e065d69cd1c2 SHA-1: 614ccd2b301423d98bd710947e2b052fcb04b99f SHA-256: 44ec0d914007c1bb588cca5b7c327aa92bc28cc07faf168355379b118f59d36d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://elminhaj.org/userfiles/file/gunazaranaromalojax.pdf
    • http://cnex.cc/images/blog//file/womegoxeva.pdf
    • http://orrizon.ru/images/file/43708785422.pdf
    • https://frpeteradeyemi.com/userfiles/files/67380975264.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/bed04871323b847de02a65d5360e89f8/sawakakojubebivo.pdf
    • http://bephoangdung.vn/uploads/ckfinder/files/tibemotip.pdf
    • https://menu2uplus.com/images/file/vajidaniputulin.pdf
    • https://soalmatematik.com/userfiles/file/63431443683.pdf
    • http://muabannhagiare.net/images/uploads/files/15359398597.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e5ce251fd686c66a5f98d66bdad1c5e4/3566618237.pdf
    • http://cy2hand.com/userfiles/bosuweluburofuvetojupika.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/e27659b0d60725f52ae9eb0a474d0b48/38770556572.pdf
    • http://litho-and-co.fr/ckeditor/upload/files/22870966376.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bbdd39983---sonuxotazi.pdf
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/17479868247.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/xozirizuferuxikebufidub.pdf
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17752681473.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608003abb4344---ribemomogogubegagabazo.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/26272430546.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/eeb3db18bb8eb5d559dccc4018f16fc8/boruniwis.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=telemetry+placement+5+lead
    • 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_off0000fc9b.bin
fa7010601642dfd94ff4acfa7048ad4737d8c3fd2f037322f03943cb98200280
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 10504 bytes
font_01_sfnt_off0001148a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1148A 16792 bytes
font_02_sfnt_off00012c9c.bin
ace38be2be3518522e5ddd96ff77322a08309301e160ede13c029e39e1e61f82
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9C 16932 bytes