Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa489d8458012dc6…

MALICIOUS

PDF

70.5 KB Created: 2021-09-25 08:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aec5a5289b080d47d6b0c72c8d415d24 SHA-1: 36d0fb982ecb1addd23aef6b20b8dc5b9b9e9c34 SHA-256: aa489d8458012dc6cad691ecf09d1b237a28b9e15d312cda38436412e4b68bc5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript, which is often used to initiate malicious actions. The presence of numerous external links, including those pointing to compromised WordPress uploads and disposable hosting, strongly suggests a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=save+voicemail+android
    • https://phu-komplex.pl/pliki/file/mozixovelaroxubunodaxoda.pdf
    • http://www.tiande-global.com/ckfinder/userfiles/files/nogifatovivupuwofego.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148a8da1c40a---42388549844.pdf
    • https://at1-turbo-j3t.com/contents/files/9065379778.pdf
    • http://dgjinhak.kr/DATA/upload/files/202109160831229879.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145597629262---wifajuxoti.pdf
    • http://happy-land.hu/editor_up/zazababimegexesopopuru.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/14d0e9b717f372e67dda9f35927fddaf/xarufixiradul.pdf
    • http://nationalherbo.com/userfiles/file/79959916596.pdf
    • https://ruh-center.ru/userfiles/file/88933112915.pdf
    • http://residenceraffaellotorino.com/userfiles/files/navefegepolifuvigokuwi.pdf
    • https://cpsguffanti.it/uploads/file/51048985011.pdf
    • http://dezis.ru/uploads/files/36982483665.pdf
    • https://smobiil.eu/userfiles/files/munoserifurunapurenez.pdf
    • http://marketingnews.fr/images/file/30692366038.pdf
    • http://discus-rus.ru/upl/file/98393782204.pdf
    • https://www.alitec.es/js/ckfinder/userfiles/files/letatexum.pdf
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/bajoladibaj.pdf
    • http://samarthservice.com/userfiles/file/99912239779.pdf
    • https://zapcdn.space/web/img/podborky/files/nonojawisuku.pdf
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/32477228244.pdf
    • http://tzsunup.com/upload/mudirixapixinumuvev.pdf
    • http://ebrinteractive.com/userfiles/file/puwolozidevuwiruravop.pdf
    • http://lube-stc.com/ckfinder/userfiles/files/97117715638.pdf
    • http://technoauto.jp/js/upload/files/wutoromomixafumil.pdf
    • 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_off0000b32e.bin
346e08276de7f2f39fb2062a9e055fdafaefaa45158b0d0005565936019855d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB32E 10408 bytes
font_01_sfnt_off0000caa8.bin
c002c37ede6783df3f6900a7a4eebfe8f4e11b9f587ea3bd88f3b67db5e78424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA8 16932 bytes
font_02_sfnt_off0000f582.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.