Malicious PDF — malware analysis report

Static analysis result for SHA-256 951fd48e38c7483e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 14:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 71102793a5886561e9af4d81c4d4ff39 SHA-1: af4e617b886081f5052dd83320a91c7eedafc8d8 SHA-256: 951fd48e38c7483e10f0019b2be23ea44e96618a246f1267becfbf3ce0af9445
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score strongly indicate malicious intent. While no scripts were explicitly extracted, the overall structure and URL patterns are consistent with phishing lures and potential malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://oniceh.ru/uplcv?utm_term=programa+para+convertir+excel+a+pdf+gratis PDF link annotation
    • http://2ds-creations.fr/userfiles/file/46229507426.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edf444afdcf---23974721617.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/zugaxiludesomufosuxuna.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/27895769218.pdfIn PDF document text
    • https://premium-house.uz/images/file/sewobun.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/af98b109c59ca8fcd1afddab984d7d6f/rulaladezobazuvuri.pdfIn PDF document text
    • http://apcmagon.com/userfiles/mozude.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608b39d5d03f0---lexibaxug.pdfIn PDF document text
    • http://belovosushi.ru/files/25494795704.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/knov3bd72v0fo38d18n93gb25f/7411355195.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/ubghhjn1sgn6u7jhhnkdf4u0i5/refazijakanum.pdfIn PDF document text
    • http://waypl.pl/upload/File/75384185965.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/67225744836.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/dugexujufesefexujaxa.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/monawuvubewut.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/djh063tpckt34mb7j4tdo8fts8/63134278923.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/dimutaridalelazavav.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/zowapopejivevulego.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/04a5c689ffde6db2768ff17fa9175386/bigenulaxekakositebogatan.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/91277726233.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078042173c83---nasonufilesetakev.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/58764057310.pdfIn PDF document text
    • http://geose.ru/userfiles/file/tufuzewitodametezirawim.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/94380068260.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 11132 bytes
SHA-256: 42c2316f04cfd6894616f66d52f8a20b57d963c3aecb06ee34241519b078752b
font_01_sfnt_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 17716 bytes
SHA-256: f972b9a809f9b56b7e26f30695ec95f7026a2904a3f5167c9ebcee39fa3f5db7
font_02_sfnt_off000123e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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