Malicious PDF — malware analysis report

Static analysis result for SHA-256 00880dcbace449c9…

MALICIOUS

PDF

90.1 KB Created: 2021-09-01 18:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80977ae27fc1c3031a9c5e184bc6abb4 SHA-1: 52c966e714c33250259febf66a9c563b9e2ffeb9 SHA-256: 00880dcbace449c909565282369c5f9b6bb61ec32871825a655d77ecc302cf09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple external URLs, some of which are hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/gefujo.pdf
    • https://cevhertemizlik.com/userfiles/files/96877185276.pdf
    • http://esenkardeslerinsaat.com/resimlerfiles/32178919138.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/b6lae50nebm5tdnpafvvbjqkoq/15958295105.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hj74ul62nhaf6717ne64g908so/penixi.pdf
    • http://eyupsifalibitkiler.com/resimler/files/lemodomoto.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce3cd346e4---webubirakolimip.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b5d4059e91428c31e024284e66cde609/50202245039.pdf
    • http://studiogallerani.it/userfiles/files/bifoxalome.pdf
    • https://lifecareproduct.in/ckfinder/userfiles/files/67219821734.pdf
    • http://sixtyguildersresearch.com/admin/photos/file/19820133492.pdf
    • http://pasted-radio.de/web/files/lupiweriselokevujuv.pdf
    • http://jinyezi.cn/upload/63007048983.pdf
    • https://papiratisk.cz/soubory/xuxolikup.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb63152f43---piwira.pdf
    • http://spbmedax.ru/sites/default/files/uploads/jomedutiwudiwona.pdf
    • http://aroma-es.site/yamituki-n/uploads/files/jutapivorotijefa.pdf
    • https://lederstuhlshop.de/ckfinder/userfiles/files/dubusun.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/05evsa4ujpeo391l42t9l214c9/18079267974.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5e4359f9b---fiwodabivibowobizodini.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/68903866399.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/40c3e554a7b0d10ba157541ba0a0a723/luzarivevo.pdf
    • http://hondatayho.top/img-ngocbao/files/sojusu.pdf
    • https://aawyx.com/sites/default/imageuser/file/16290662001.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=dungeons+and+dragons+monsters+list
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f551.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 16792 bytes
font_01_sfnt_off00010d68.bin
5a803c6c9236c58b1876074042d95f38ae36098d29e51dfc1a993e1d94f04dfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 10692 bytes
font_02_sfnt_off000125b2.bin
3775d6ceeac4b076ce27937a612bb506bce65b1d29024baee6f8c0a28d7f86d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B2 20772 bytes