Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da047897fa31ff6…

MALICIOUS

PDF

88.8 KB Created: 2021-06-30 04:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 18416f8a0e125e960f23c4ebf2189def SHA-1: b9b5491a3297e712303e4e61b9ceee38e883be0b SHA-256: 5da047897fa31ff6f03d7334cd68ac4801a41e06eabe0888388a50422acef965
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to initiate malicious actions or redirect users. The presence of numerous external links, many hosted on compromised WordPress sites, strongly indicates a phishing or malicious redirection campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=self+pity+in+tagalog PDF link annotation
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080cac596dc2---32459697293.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/wugoxuwiteketus.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/3d8b2c14b3b6e08a3b616defe54e4f6c/mopinatawoselow.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/b9efd4ae5febabc7cda47c2fa6627731/lirisanizutolusizanit.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/12911358969.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/2461990425.pdfIn PDF document text
    • http://goref.ru/files/file/mogova.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f6ab38b33b2c3207b94491de8789e6d3/gewusafuxel.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/sb2darhq5qeephp45oajc4es06/fogiti.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607259f948c0c.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/4k3vgoh3tk36pp40qb972ea795/gikezojobi.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/2cv3d5tol439flu51em2cefi3h/82678211741.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/31298347384.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a2366766e---ragutilegovoxokekigele.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/o54es4ottooanptrssu2ops3h1/joxiligadolefilubojetope.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b808c9a4---gilimojixumivomokurudeb.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/31585676595.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/19638131602.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/gde71rqt97kgl1kjg03rfh76t9/fejakozubegude.pdfIn PDF document text
    • https://nada70.org/userfiles/file/25137545037.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16085d780b226b---30465493644.pdfIn PDF document text
    • http://teraval.cz/res/file/15846358611.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/34191594336.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/83596513477.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e3a459f1---94654404501.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/30605115069.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a83e9bbad5---tufawaligorixonejote.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 3076 bytes
SHA-256: daf6982fb0fbc744d64a737bcf99fba7d5d1eb7941dc6b83b82d4cce36139afc
font_01_sfnt_off0000f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 19160 bytes
SHA-256: feadb223c9695400ff3eae5a3bb14973c21498c5095f05465fca3d63b47edb0e
font_02_sfnt_off000123c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C2 10456 bytes
SHA-256: daf9eb93ff199fae88dadf16a12fa65b5fd1d226c8b044146c89d1322c47920a
font_03_sfnt_off00013baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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