Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1074a1de5e69276…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 22:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5586fd11f84924f0eb50d9dbb6a4846e SHA-1: 699f12c8256dfcc9b123277bde9da4b9f3e776dc SHA-256: f1074a1de5e6927685e548a1645aaca454f9bebb6a8003157713cd830a1b1c72
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious sites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=how+to+get+deleted+photos+from+android PDF link annotation
    • https://nasco-ye.com/uploads/file/betameginujun.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4789e954e---dulufubugadigagopeb.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/tepovudinatoxurapereted.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/21687403218.pdfIn PDF document text
    • http://videlec.be/ressource/file/wapojabevi.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/47308356900.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/84110884828.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/88687595106.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/rutisor.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/nezakepapurubinar.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/bomabovopewu.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/renoke.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/7097023181.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/peluroxodevimejozofifu.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/3818297926.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/kixulinakal.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/tovumefugobinatupatuw.pdfIn PDF document text
    • https://interconformity.ro/images/file/86990998769.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/55671444501.pdfIn PDF document text
    • http://linza-market.ru/upload/files/kopaganenasip.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f300ccae81---befubegewadinatizolapux.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/81348740758.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_off0000d340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD340 17908 bytes
SHA-256: b6f056811af77c69edabf3ff52006194ba3e4c5fd302bd4be40ec74e5579c822
font_01_sfnt_off0001016d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016D 11020 bytes
SHA-256: fdb322ba4631ceded09da7e90247fb777d71d9747ca67d491b1accbc73e4099f
font_02_sfnt_off00011aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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