Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcd775a51e71e8f…

MALICIOUS

PDF

88.3 KB Created: 2021-07-20 08:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d5dfc96e1c8d5bf359db53de63992db SHA-1: 940afcea790003fc70c1c99a9459ff979016e0ff SHA-256: 1fcd775a51e71e8f42b60acea8fff2be29921d66c39be57c5720babb13b050a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d7b8a2e9f---29072988022.pdf
    • http://wawa757.com/uploads/files/zenafubo.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738629ecdb9---rotadil.pdf
    • https://activepymes.com/pub/file/36046631134.pdf
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/45651451468.pdf
    • http://campcolefamilyreunion.com/clients/82065/File/92350357106.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccd2e25166---todalupifipe.pdf
    • http://giprozdraw.ru/ckfinder/userfiles/files/99770038535.pdf
    • http://dreamcatcherltd.com/userfiles/file/59770097036.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dc4ad9a90---fizomigizu.pdf
    • http://gewald.ru/content/Files/10971187565.pdf
    • http://wooshin.kr/uploaded/file/128195179160d90186b7d45.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vaoj5tg63k8ppspda1r89k3d60/vuxudaluxu.pdf
    • http://gayaarchi.com/userfiles/file/20210606072152.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/kotobitedibuwuxevobilovu.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/vche1iqp63r0iu8ngk787e1s92/lazojitozoz.pdf
    • http://msinziniering.com/userfiles/file/polidutel.pdf
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/38435929941.pdf
    • https://audit-advisers.com/userfiles/file/wudokopowaxesajovaxez.pdf
    • http://ahcxdq.com/uploads/file/070850441652.pdf
    • http://hzjksj.com/images/upload/File/vugutameb.pdf
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/97316783638.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e625b72a93---vofetipaxiwidiwora.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608421858ee10---1149635403.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/de1befa30e5f16b7c7dee69ebe7fc092/18654575449.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=watch+big+brother+over+the+top+online+free
    • 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_off0000f176.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 16792 bytes
font_01_sfnt_off00010988.bin
36ff5fca8df5cc3c137c610ee693d2c22ed667a8302218ff63cd182f74e2f1bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10988 18112 bytes
font_02_sfnt_off000138f1.bin
ad4daa885ab3dd196f2b7c918acc93628e79d76e62413a645cb7d4224b6ecb88
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F1 10792 bytes