Malicious PDF — malware analysis report

Static analysis result for SHA-256 4172324e58bbdd8d…

MALICIOUS

PDF

85.5 KB Created: 2021-07-10 11:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3b2018efe880323a2adfd2d35692266e SHA-1: cd14b95aea8881d7968f614f0cfdc715e20e74c5 SHA-256: 4172324e58bbdd8dc86b2354ba2387e5577c64cdf3b4ac1752cf45ecdbf70713
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=speechway+teleprompter+for+windows PDF link annotation
    • http://technoculture.cz/admin/upload/file/joxagezexasekusetede.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/64556439815.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6239004a5---47259504807.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/kedarefite.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/porinukamidowuxejuru.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ldvr7pabaec9b477rcsokv1966/medulusewaxowetos.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04a6e3545c---29409409894.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ba7c8c6ef---70165344102.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/lavopokapofet.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/gupitiguvutijejeninamajot.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/rvdm3a1eq89cu14610uordjgc2/nesuwojulokegilide.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c553f3a1---zusujumusiver.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098b3e66ccf5---gezobiguzo.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a928c1a4ee1---20243347929.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f7abd90a0937d83a1f3fc2dabc4079de/89466048658.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/radosedut.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/17800755424.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/0f6aae07f8a76cb1934313741927bc81/57177330240.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/fexufobusakixovu.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/45778010163.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac691dfe8---67631374296.pdfPDF link annotation
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/623602b08e62089d210a847ff7dbbe8d/digutuzeti.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b3a2519e5---76756171439.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_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 11160 bytes
SHA-256: 0cae6b5a5ed708c62ef7e43db7ac49802cb40f192c19fa83c4632e5a2f1b788b
font_01_sfnt_off0000fff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF5 18284 bytes
SHA-256: f3017c369f73a67764fd221b133cbbf5c468e0c3849297781a24441ee4d16901
font_02_sfnt_off00012f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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