Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba749238e07efe1…

MALICIOUS

PDF

78.7 KB Created: 2021-08-23 13:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b5dd45bc0c09b97abb4e20ad4cd0b565 SHA-1: 23dab4c0dfa8c7176ba9e3b9a9ea1b5213197588 SHA-256: fba749238e07efe179025022cec6a54cb939a9f27c59fe2b5e340728b8111b8b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate a link farm designed to redirect users, with one URL specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=never+done+it PDF link annotation
    • https://fishuntpesca.it/file/zesupelevudifinowag.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a39cdc5b56de5668d5f0ebc9ebec3474/28352341585.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/88382700597.pdfIn PDF document text
    • https://magerp.org/upload/files/82809346431.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/74403061871.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/19221149278.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/98996240341.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/38904204577.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609417be84446---vosiveseli.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7bf12ed75---bikavizikulagavised.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/sopajopefufapeve.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea4812de58---65674975096.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/736ca538fea1e89d471e4c29bf7d2c3f/58327099672.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/muzamufibubaxoz.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc738713f0---68366076401.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f304ce0ef4b---27294722635.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/pokopuganawipujogimorom.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/62db66770a3b10510ef763992bac4233/lepobanosokuxevodakusoji.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/26659879829.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/69486985886.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/23507761777.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/64874351669.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/47134577082.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_off0000d35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 16660 bytes
SHA-256: f2570eab24ad2d13f06ac3374a9b62869ea0092b561b3673c3ef8a7dd95ced37
font_02_sfnt_off00011701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11701 9908 bytes
SHA-256: fb63e109531fdae304012e4b8da6cb14f4ab75bf2e9bc686fab4466630d4cf76

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