Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52744462b9a57ad…

MALICIOUS

PDF

81.6 KB Created: 2021-09-08 09:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9b57ede358ec4dab8b3412ed4b14f6d6 SHA-1: 5f67d5fbd5da42749e2cc1992b0ebc22d7e312b7 SHA-256: e52744462b9a57add001e8d1a62146037ba319c59610007a3491f4ddb5548b3b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The 'SE_INVOICE_LURE' heuristic further indicates a phishing pretext. ClamAV detection confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pistant.ru/uplcv?utm_term=xerox+machine+price+list+pdf PDF link annotation
    • http://asvpp.fr/pdf/32552019789.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0325167001619905701.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/96480740844.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/ripizej.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/kejasusev.pdfIn PDF document text
    • https://e-midas.ro/files/file/15615786298.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f4aa492180bcb857e8396c4cfa3710f8/70111785016.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/digudaxuraxis.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/6368665747.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/22565553749.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/878kr2brik5dgl30u1qojsv3bv/sowevu.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/20005869734.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/93881275390.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074405f8cf57---54540714021.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/27747325683.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/ninatetejabiwula.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/7mbg2pi4ph0hf46tabujjhdgd2/femizutijumik.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a4568cd35---taxuxa.pdfIn PDF document text
    • https://lasanisports.com/files/botoxegod.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mvipncrvbg08esv36pebc2irs3/vosunuvasomus.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/81351091189.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf50ce4a76---38288631178.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160817149a6f23---muxaj.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/madaxibojobinigonobe.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/74099462970.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_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 10992 bytes
SHA-256: a91df857499c64074c0920eb9e1e7ae701891a921676a3f9c0705d351a4913bb
font_01_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 17136 bytes
SHA-256: 5aa65f08f8821eece53435d711c6bd769b3a0e16d7c4323c77add613e70059e4
font_02_sfnt_off00012083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12083 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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