Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be878d0d50e7ac6…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 09:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7ea91de36f195e2d6bb3a070f2911f32 SHA-1: 86a15520a5a89a29d291a28dc90f5d7472eaa9dc SHA-256: 4be878d0d50e7ac67bd62ec95bf5c769331c7e604a95c202e99df2f48bbe574b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links, many hosted on potentially compromised or disposable domains, suggests a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document may also attempt to trick users into calling a fraudulent support number, a common tactic in phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/libitiz.pdf In PDF document text
    • http://geose.ru/userfiles/file/zakopurusalonobopiza.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/xadisezopalugolinifiwale.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c201d5c1c---damujusozajarutixaguf.pdfIn PDF document text
    • http://vejwun.cz/images/5899460401.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/wowenabe.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160767828e233f---2050941823.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b9cdaaf32bf81dabb04be808b746336/xafenolowojekegebe.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ea98c4d369fd422e2b1551b0b53120b1/porefogitebolagidu.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/sucr6tmsrfltig0bkeomqmbho5/28805080489.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/a66486dfe577da942afa1001823377a9/77409583240.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ca7b316c14---tuvam.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/fevdhggdif2dltd06sv3osiir4/54881548144.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/38005947522.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b72c09b9477---73313648146.pdfIn PDF document text
    • https://afayl.com/userfiles/file/ridinemikimowifumomobi.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/38471374579.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/82e5911a8f385be8bc1235df7ebc8d48/5896893642.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ad405d2872455dd7f6627b4b2c9444a0/92446976339.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/affc0186f6fd156ef5fb24ba713293c8/16433003333.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7fcb0fef---dugomadapojemej.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d5ebdfe69---67833478203.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/0436b03275cd318f50ff0f2b37388a30/65784290911.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160c77bddf39e1---28871049528.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/49473601623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=growing+shallots+in+containersPDF link annotation
    • 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_off0000ea56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 16876 bytes
SHA-256: 7a8c280f5c13deeda52ad02a8b337894bd624fb0c9f5f44526f43fa0f087e64a
font_01_sfnt_off00011630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E47 10636 bytes
SHA-256: b2d02751dc91469624d0e0c050bd2f0a275103c0399aea892eae7ff337bcd08f

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