Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc43f162ba348086…

MALICIOUS

PDF

72.7 KB Created: 2021-07-01 21:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 20cd9d4586764381759a8d0b0b2ca531 SHA-1: 76e73bf13d8afefd8630ce4356d5a43075cd7091 SHA-256: fc43f162ba348086522aecb28ce7c24b25b45041bfcf4519f5a7cfee2047ae0a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress sites, suggesting it's part of a phishing campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech support scams or fraudulent billing schemes. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall phishing indicators suggest a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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) or Microsoft license-boilerplate 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 https://laborke.ru/uplcv?utm_term=parts+of+the+book+grade+2+worksheet PDF link annotation
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd102d62efd---jarow.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/sebunozujuriligud.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/96651463369.pdfIn PDF document text
    • https://mavibusiness.it/file/soxadix.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/79202309647.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/95858867262.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/7fd63kcf6kb7msc99mtgfa5375/jorajedixidunikoganujifu.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fbff07bfc7a1444810012426d688a220/laxijolef.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c73caea87e7---39849537269.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210618175717_591682895.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc02ef39c5---tedemawexureribewaj.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c746da85---dotozulituretofazebufeda.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/xatuwijuposavopebi.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff12689eb---xowumudezuxulolufeke.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/mezabitedixivu.pdfIn PDF document text
    • https://primer-spb.ru/files/files/tedomubulimelaxa.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/nerudotubugivaviton.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/0667ad2864014049fe359a32e10fbed4/newesemanaluroxe.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a85ad7292b---76992097316.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/wedinesamubiwujojir.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/44310108763.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/abvao8201t7vo65fg2at0lic07/pesibotudonewan.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/dumibox.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/jo6u5alvg62oovh337dld9m278/7256526641.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608307ae2d4a8---70864153294.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_off0000bae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE4 15908 bytes
SHA-256: d832147e4fa3c59bc18f6f5a936561b5792fba27966c27b0b93111b771b2700e
font_01_sfnt_off0000e424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 10828 bytes
SHA-256: c40ad7b100fc2f1d760d8846c0f69c73d20bad7ea0f2b56bd2c51bb65877f23d
font_02_sfnt_off0000fd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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