Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba185e9dcfff75a…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 11:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ad30c34f5bdf230b7d0d8674aa88801e SHA-1: d73b5393563e2ed4050d1b8c44e0033608b4f04f SHA-256: fba185e9dcfff75ab2afd2c4c091051f450b30ff533d3ee4d07bd911308dcb76
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains a large number of embedded URLs, many of which point to websites hosted on compromised WordPress installations or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate effort to create a network of links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pixomot.ru/uplcv?utm_term=nitro+nation+best+c+class+car PDF link annotation
    • http://ritadas.in/userfiles/file/71613284328.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/30280891172.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/dodolimid.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4e5abaa1a---tadenutiwewowubavatafupug.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/mijalanus.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/77167507723.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/poridusus.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1852f5c0f4a06204bf13595b650ab975/4691243326.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/porezutumenasikigu.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/1840171546613ba14838dea.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/benivukesak.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613099588b341---fobalezarijupakumonotet.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/58780762463.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/68096957055.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16137facfae7e1---98091789567.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131e223c78dd---lugip.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4b61dc16d2a5eb46a16f97251ecadaa7/99151090497.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/54330993078.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/17846054377.pdfIn PDF document text
    • http://seattledesis.com/fckeditor/file/tetumapewafoweresiravogup.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/fdff0dae948521d5e4125000659e49d6/wujevaviziginusuwavafoda.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/80023794213.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_off0000d699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 19528 bytes
SHA-256: 1afa130438c26494c29d8ebaffdb657e9bbea956e2b22f4a478d1acdc801187b
font_02_sfnt_off000120e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E9 10340 bytes
SHA-256: 3e7632b79493d36789fe50c39a16d6466b7166d41ac76bf7baca35814f8b8e51

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