Malicious PDF — malware analysis report

Static analysis result for SHA-256 15492d382c515027…

MALICIOUS

PDF

1014.0 KB Created: 2021-07-01 10:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 20605428935b8cc74acc1395b9bfb208 SHA-1: af2152a4e1aaeeda95192d793115324f51f51943 SHA-256: 15492d382c515027a0be820f413c39df0eea28221b03ff97f5a3fc99b392b841
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as a phishing trojan by ClamAV. It contains a link farm that redirects to multiple domains, including compromised WordPress upload storage, suggesting an attempt to lure users to phishing sites. The presence of external URIs and a link farm indicates a phishing attack pattern, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4292

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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=ms+connolly+shanley PDF link annotation
    • http://aliceinformaticasrl.com/user/pages/jorawuxigixefesi.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/batovelekalujena.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/rixabimikeg.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/54808801642.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a36a32ca8c5---66923252694.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb0a018341---12762267224.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/xuruxezikares.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cc7994a31---60300131268.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/biduvodowamitasamerokuj.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0b0cabfcc04d97ce5fa06fde25b5b41c/gemizukokavixodef.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210529214320_763926386.pdfIn PDF document text
    • http://lawngo.net/fckfiles/15011619840.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c645a268c0---losivufemazolonefiwumoru.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d80e7bc7b4b---91422688951.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/zajarorojinapoluxe.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/42bbf2def1cc4c28f8d36a15cc32f680/lolawalakunexuxexamasote.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/nuboduluderazitafezab.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/31070418163.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe1d59f3c6---bimufativukerotun.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b97fa322a8---borizemadanudojonagi.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/webotokivitibipadoju.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607765f6e97df---zimuvexegamofawij.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/malutexiwokimamojibos.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900215ea4fe---66465233204.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609833ec3a915---vajisafakixurapomi.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607999de56d63---65107910640.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607832a8bf43f---45669839409.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_off000f5722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5722 25624 bytes
SHA-256: d1e3a40296f5072624340d53407c1b54f6c82672470e8c9fa03ffc13ac8ad84f
font_01_sfnt_off000f95a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000fadc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC9 10144 bytes
SHA-256: 6c4b327643e7ef213233ab5b2967d56cded862ddb7b6e1c9eacdfe0693ff28a5