Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04269ef36dac038…

MALICIOUS

PDF

92.2 KB Created: 2021-08-04 15:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4439d93a2e88680218c83624581c109 SHA-1: 28e6feda89da7222d992ec205465f1f995a61e66 SHA-256: e04269ef36dac0389d57eb23d73a6b6a51d13c8f9e3be2fbe9ef342da250b9fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, likely serving as a lure for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting and UTM parameters to potentially manipulate search engine results and drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://pistant.ru/uplcv?utm_term=manual+de+mineralogia+de+dana+vol+1+pdf+gratis PDF link annotation
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/22dc8013836253a83e3206924888a622/mivofokofilugu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f3cb2cab5---47157601797.pdfIn PDF document text
    • http://afslab.asia/upload/files/56505332127.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/52306763454.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f408ae90ac2---91914937357.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/jumedofobofijejuveke.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/68901055590.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/5c9378982e06760c67da171288eb1389/vibobuzigete.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9023a8e66---zorekuvapimiza.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/73073381459.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e18e701fe---213363254.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/4a2db3344ecc227b3e6a8b597031da52/rokowezenekuxududanifedab.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j8h15t1d673s2oh3tq3uc2it84/jariluzudoruf.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/3262393364.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/98205572605.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/3lkuepbeullm7gk2n8kdulfa73/40682776512.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/8884618074.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c36646371---rotalobowor.pdfIn PDF document text
    • http://garderoba.sk/images/_file/sivogakelononuwabofitoga.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/jegakitafewikiwemegexonu.pdfIn PDF document text
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/15683579649.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8dc3bd719---jusudiwijapenadojomepa.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/rkao8sofhd4tqd8gv06fjag30u/menodurusiluw.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e08b97818de---famuzojalatitodokajul.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/juzibij.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_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 19460 bytes
SHA-256: a17f4a1139d4b8d96cc0c11713503426c633122e2eee36c0f6075a9c0ce95ad4
font_01_sfnt_off000119f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F9 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_02_sfnt_off00012f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001478c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478C 11052 bytes
SHA-256: 7d73d08fd62c490f00c00a7917de5b8f0c626cafdea3fda49c8306d425c3ad95

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