Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a0fab7fa8526b0…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 14:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a832ddde0176f8c4cb162bd945ba6ccf SHA-1: d8c3ee50c8b59508e3e0a92c1e31a4558edf0437 SHA-256: b0a0fab7fa8526b0ce872096202d1303b1594e8ca9d355240b7464ca44d19528
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating phishing and trojan behavior. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=order+by+sql+two+columns PDF link annotation
    • https://musikkursus.dk/userfiles/file/ruzasaledowovabipu.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/djtmq6m46tikmg57a2vbgc2bbq/2015792593.pdfIn PDF document text
    • http://chemicalengineers.ie/images/17381051887.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/64373059655.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/7b4a238790ead78e53da49e6771053f4/79061811147.pdfIn PDF document text
    • http://dzbnf.com/upload/file///vogolofedewabusa.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fef7be1afbd---33658742951.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/43050356293.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/jusodajaxusikafo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611850bcb2467---84142512452.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/tusidiminevarakisusoka.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/48804961671.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/jewipaxanezapus.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/46390944071.pdfIn PDF document text
    • http://smn1970.com/clients/d/d4/d44d2684521ac238e4bdef02d06179b0/File/23680836164.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0feba32e843d8bf4f4bc98def7a253d2/kisebelawupufokimujatubup.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/joboneni.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/43583353522.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/jusunag.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606d2e5d0b612---4184765347.pdfIn PDF document text
    • http://charivne.info/images/file/luzuxidapa.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/57329411515.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161144cf7cf150---27989045485.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c179b9de521---gojixolezatifewedajakasu.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/73028542427.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_off0000e2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 19232 bytes
SHA-256: 658eb47179998ec8cb74b96042e7f632d39ae82488350bf7123d516d38e9dad0
font_02_sfnt_off00012c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5F 10888 bytes
SHA-256: 467b4e71af276d676ce22ba1a2191460a6b6514acb848601c07bf11226ab0153

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