Malicious PDF — malware analysis report

Static analysis result for SHA-256 060c244a8ea8c089…

MALICIOUS

PDF

82.6 KB Created: 2021-09-10 13:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f661f78567d4555e985aecd382fa1621 SHA-1: becd62e29217f6bba6d8ede186fdcd8982b6bb17 SHA-256: 060c244a8ea8c089fcb968b02d8962fccdc3e7897a64be526a5ae875d9ad017b
164 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on disposable domains, identified by heuristics as a potential phishing lure. The presence of a 'download button' heuristic further supports the intent to trick the user into downloading a malicious file. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://seattleteriyaki3.com/uploads/files/dapotubiwuvupa.pdf In PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/verozasufewo.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/tedowepokewalu.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/gobumesuzelu.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137d51c549ab---7007397993.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/fipowulosa.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/98461963857.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xokemigojolopinaripa.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/16942290753.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/guwerixin.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/5951732427.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/95417250536.pdfIn PDF document text
    • https://euforbiabulgaria.gbinvest.net/uploads/pages/files/winabezikavurarolosud.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/52242219894.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/34285668468.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/juganoxapuko.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109050349585512.pdfIn PDF document text
    • http://hangquangauto.com/files/ropivinonur.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/9659ebd20fe67987711f986508152142.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/32129851895.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/24536da5ed1d374f193ccc47e8f609da/parodiburomesirobegodiz.pdfIn PDF document text
    • http://marketingnews.fr/images/file/mapobeguputapesuberixumo.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a42e69006---xometebapab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=samsung+g600fy+flash+filePDF link annotation
    • 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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 10920 bytes
SHA-256: 9fa8cae6b2f66a22416ec000366104a95f46383760833a5d79501c243b31fa7e
font_01_sfnt_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 19364 bytes
SHA-256: fc3b2372418f9a10dbd2f5ba527525ee0cc6a7e2bf7d4d67394ec8c4dfedbe62
font_02_sfnt_off000124be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1