Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abd4cbf0df1fec7…

MALICIOUS

PDF

92.4 KB Created: 2021-09-01 13:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6b6e3815ad64c1d33ddc9d395b018b1 SHA-1: 7dcfaee1d84651e2de6e55892a04dd8228ead015 SHA-256: 7abd4cbf0df1fec7130780403a0501be0e1106a6e26a7f5ff337115ddd8836ae
164 Risk Score

Malware Insights

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

This PDF file 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 domains, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of a 'download' button heuristic further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kohphanganhotelandtour.com/userfiles/file/30509521625.pdf
    • http://tecnoservizi.com/userfiles/files/jepapuxogajokokemo.pdf
    • http://resetimpianti.it/reset/public/file/81730478734.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e24918841---6057155319.pdf
    • https://bawaniint.com/ckfinder/userfiles/files/25186645210.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/0em4k4gbban25tl5c43su605c3/44077578797.pdf
    • http://pmke.cz/pictures/files/dibexijomabonibudi.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/3e5de8093a9eccaa486487d32f3d2c72/tavufanibateludekovutake.pdf
    • https://okazdedziecko.pl/_files/Media/file/sanize.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610258fa385b9---7228472294.pdf
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/3caca50c4e1bf0a9232935a91abc910a/69196446461.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd35bd6c8---bomijilerasug.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608729952bc42---99801703485.pdf
    • http://ayhancevik.com/images_upload/files/lamiju.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6683e1cd70---61112761729.pdf
    • http://liebherr-tr.com/userfiles/file/budolukefep.pdf
    • https://heatingboiler.ca/fck_upload/file/xijelopenaf.pdf
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50498829066.pdf
    • http://raffaelecavazzoni.com/userfiles/files/wilijowipow.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607373f206bd8---giduxafisojimekumumijewox.pdf
    • http://namhungholdings.com/uploads/ckfinder/files/71115318015.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=daily+office+readings+2020
    • 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_off0001053d.bin
b0d3246ff70a906475a16e16a2fff6d3f5cbea5e9b7987dff6afffe4f0725c88
pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 10912 bytes
font_01_sfnt_off00011e73.bin
b889dbc50dd68ccd4434302d3eda5390e598156119f28697b3dba8197074af34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E73 17016 bytes
font_02_sfnt_off00014ada.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ADA 16792 bytes