Malicious PDF — malware analysis report

Static analysis result for SHA-256 6048df3f64d88557…

MALICIOUS

PDF

70.6 KB Created: 2021-06-26 12:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 736f84ef5dcaf326b0c5d72770774aa8 SHA-1: 5a6c0808ff2fd7d2a6d3a5eb419cfebc5a8f2aa2 SHA-256: 6048df3f64d885574a1a167122f53830878493725de16b258f9f66441b0e4748
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised websites and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest a phishing or trojan payload delivery mechanism. Although no scripts were explicitly extracted, the nature of the links and the heuristic firings point towards an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://inwebjor.ru/uplcv?utm_term=void+meaning+in+c+programming PDF link annotation
    • http://biurod9.pl/public/userfiles/file/razobafi.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/61893164713.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7d4546b9e---jakejaxijekit.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/fokitaxemolup.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/goboz.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/980234d6e23e4f3ac4a03cdeeae2cb1b/loxulimavuzefowu.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/warigipafukamunudono.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/nulojenerezobuxivow.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210626082227.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a3359c08e11dfb9e5130cb1cce851a42/64816386631.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7013186726135f4667e43a44ed46edc7/tubixenomereribaragada.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16087225edfb8c---lolimunakafo.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/84770689909.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/45099721475.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/p980m0604fhg8p8lbhtfo8kpl6/80545507773.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf30c7551---81169539217.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/ab6621896062ba43fe487bdd8b6ca5da/xiwivelipipon.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/21817465088.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/6hd36ra1c82g0lqpor1kc6u7fd/92679785006.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9c73e0a93---dataraxexofim.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/5b84b5b100e078906a44c324ec587653/sodejusevefugusozeviweg.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_off0000b3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DB 10516 bytes
SHA-256: 82e95a3a32fb9615ab65ba183f897d18ea51562a7850da445d273d225da14810
font_01_sfnt_off0000cb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB79 15836 bytes
SHA-256: 4702167dbdc48cc4d30a58bfacf52018c75f4dbdd648e99887b530a88a887d17
font_02_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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