Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc44232bee0cfe5c…

MALICIOUS

PDF

99.8 KB Created: 2021-08-07 09:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 4246fa114d446b706c88fd99d5bf06ac SHA-1: 6f6bd881691da2674480e30050deadab9e2b47c0 SHA-256: fc44232bee0cfe5c17cdc9d1cd9deaf310fd339da615ffc2cdf5c27afd7efd62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggest an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • 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://huntic.ru/uplcv?utm_term=hijyen+s%C4%B1nav+sorular%C4%B1+ve+cevaplar%C4%B1 PDF link annotation
    • http://www.urbanwaterways.info/files/4084214206.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/321ec7d8a7f7713e55e15147a94874a7/dorejanubuxefalo.pdfIn PDF document text
    • http://immopolignano.lu/images/riwudukov.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160e79829afada---69578550185.pdfIn PDF document text
    • https://epiphanych.com/images/file/65130936644.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/gigimiderexaxatewezusid.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/43e2879dfd61a58e4d23b0e860697971/53744198921.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/gofulogovu.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/10943603016.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/q9a3dkotkmibu07tii7ou7p003/sarowotodulemup.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/27704d5ce84858e76c46a12b875922b5/xugunibonoz.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/nozinida.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/48115046121.pdfIn PDF document text
    • http://patroha.hu/file/lenemul.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/7af6305c0e3dddac0013345bed81ea8a/67848057312.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22fdfc85c5---47072309929.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/pjdkmtj04i143gf56eugm1hlk6/newunomawiroxus.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/553b7f9fdb5c856d1d8111b059c6390b/35470860855.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/12c7m1lblfm4nh3m1j007ld16d/gitanesarumoxew.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/b160f6078c8c94c7fb3c30da9444c6a9/narugad.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d6757a6e9---rasifafoxomum.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160836312c0760---7511133060.pdfIn PDF document text
    • http://budka39.ru/files/pepiz.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_off00011d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3C 10716 bytes
SHA-256: ded6bfc40057e678e4bea60991fcffef3810efafcb41f8b9289a193a0372b3c8
font_01_sfnt_off000135d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D1 20108 bytes
SHA-256: 8e95d12d058212729b124d8e6dff7f9f9274ee260ff0093f5187144ac6d5205c
font_02_sfnt_off0001663f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1663F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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