Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f250b60fd09a08e…

MALICIOUS

PDF

78.7 KB Created: 2021-09-04 10:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd2c8cfcc5092a04b10c5472bdc98d6b SHA-1: 6992908d9b223608cc715c8ed1b1e9b295734e0f SHA-256: 0f250b60fd09a08edf68d2b6a8c9e709af04acf7833134c7fc76b3f4ba9e6395
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the presence of many external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=captain+sim+757+tutorial+pdf PDF link annotation
    • https://xanbiente.de/userfiles/file/sugelukulapabubogujirunaw.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a82a55f1dc6---rulipafizidazibomexuv.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/pitokuxaxo.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/63812114266.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e7083f20970---36797650894.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/604da17f3fcaff5a82efad3f8b7acafe/moworubexuxafodezisenaw.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0b68c25bf---30313413301.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/br5mjasmr3i56obea1l6s4jd75/72668070012.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cfotcputd11pabm5iurv859fa1/20083349702.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/9c6f2d464c9a3fd635044653e4d98e84/mubagebinoxamudikir.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/52322087183.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/79453222516.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/bolupiruxadaga.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/rozurus.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/o34i4nm7vf8hsc82buqk4julo9/pawebixaxamaw.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/bawewuwo.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797a2bdad6f---jesupirabem.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/55691a56a5da0776c0590f78a0ec0ace/17578303974.pdfIn PDF document text
    • http://russia-ex.com/images/blog//file/pobevusufudiridoxabumezam.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/wimudanegum.pdfIn PDF document text
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/jaboli.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/34795203140.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/joxizopuwubotukakerazom.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/xovix.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/91449325582.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_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 10844 bytes
SHA-256: 4b761d5ecaacf987c467f61389c1f80bfaeef961abad27d1b90eed00347100c6
font_01_sfnt_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 17784 bytes
SHA-256: 20a25b982c1757d47965cd2aa76ae9e17b9b4702954b88ced640f7a7bde05745

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