Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e82080d13a99db…

MALICIOUS

PDF

139.3 KB Created: 2021-08-23 17:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4de14995b678b022e735cfad8ef21de2 SHA-1: a501e29820125b4ae0257bb0a84991e555691771 SHA-256: f5e82080d13a99db5e46daefb4eed5704e71c35899dfabfff7c5d0e8571317d6
212 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing and payment redirection lure. It contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to download a second-stage payload or redirect the user to a malicious site. The presence of invoice-related language further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • 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://wastran.ru/uplcv?utm_term=drawer+and+drawee+meaning+in+marathi PDF link annotation
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e80f7e3ef---subibowivufanexax.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f139261dd34---45683598857.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210623044616.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/s7luii1heq8b3ac9604q1mj090/80044949156.pdfIn PDF document text
    • http://honghuibio.com/d/files/91799685731.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/7088231306.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/72837322985.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c621175001---wotogudawawavumuke.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/38622623910.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/nowewujogurijafapa.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/71957742865.pdfIn PDF document text
    • http://ashioke.com/images/library/File/ramilolinibigeke.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/51e80d2d66cd456d485a4390a15c1d1e/58425461053.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/zunamazikojisepizukaduga.pdfIn PDF document text
    • https://agatanorek.com/files/file/ladijenebizugokolalo.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/denameje.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/57671808105.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/didat.pdfIn PDF document text
    • https://epiphanych.com/images/file/64619243410.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/4535affaa45bf3b3cff723ac10a73d2e/99465963481.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/d56c1b675cf86def9faae23143a07d01/44663407004.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ca3ea375999e9786940bec59db04bd1d/maziwezopiseze.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098977f2cbe0---lepefalexavadi.pdfIn PDF document text
    • http://sparkpro.lv/content/file/nilawoguposixifilikef.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_off0001afe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7FA 10448 bytes
SHA-256: c4353151ce5c396b651a9842cd53c9240c90fff01e0a4974719acb0819f92a09
font_02_sfnt_off0001df46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF46 20264 bytes
SHA-256: d8e461bb5eac335bafbfcbf6d5e41589a77f5091fc6feb7e719ddc36afde0e42
font_03_sfnt_off0002137b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2137B 2492 bytes
SHA-256: 75b5da2df643f924bd3cb5cd35438baf1e86c1feaf3f313d5d3248f3b7ac8a68

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