Malicious PDF — malware analysis report

Static analysis result for SHA-256 417ad98bc0fc2bdf…

MALICIOUS

PDF

83.8 KB Created: 2021-06-27 14:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eca08d4bb0c115dba2eb5b5292c900c9 SHA-1: 692aead68e07a9779c06bcd3a2c91f9b82701cb7 SHA-256: 417ad98bc0fc2bdf7892102cd5eaa504183ec20724c3235c4dc29b352ba73412
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a link farm designed to host or redirect to malicious content. The presence of a 'download button' heuristic further supports the idea that the document attempts to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=how+to+convert+gujarati+font+pdf+to+word
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b76c79c1f---tavukamuvapofes.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae36d01e651---72178198056.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/62406833047.pdf
    • https://bawwabatrizq.com/userfiles/file/kimitaruvagamazoravagenu.pdf
    • http://xboxheerlen.nl/userfiles/file/kozulepofivaxiripi.pdf
    • http://studiogaleazzo.eu/userfiles/files/79631514525.pdf
    • http://j-club.eu/userfiles/file/lelolo.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/up4j3qhvgvl918gibmool8jooq/vujipitadijewibemajob.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb50a876c7a---koluguvanet.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b608d235bcc---59041165613.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f29d0ec6---toranijabitej.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0712e2b301---potirivefogaxevizivuzalo.pdf
    • http://rolmech-strzelno.pl/Upload/file/sagovafebebodopusigazone.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/78f04e6d820b61de7cc0e2d077232cc0/4119913081.pdf
    • http://thementalhealthadvocates.org/files/userfiles/file/8974799457.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c64592c553---66602976915.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/606339de4c634d8f8cb2ceb91f5e9d3e/62061922324.pdf
    • http://shopcloud.cloud//ckfinder/userfiles/files/7029674057.pdf
    • http://tortsurprise.ru/upload/redactor/files/99559864586.pdf
    • https://rybczewice.pl/userfiles/file/17837272911.pdf
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zojuteniwidubezepal.pdf
    • http://boldogelet.hu/media/72931559779.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0244c911f3---wigufog.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_off0000e49d.bin
1f8ab8a03d75fbed9df458a786839ccf4bc118c8fe9cb097aa0de914bbead06b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 10952 bytes
font_01_sfnt_off0000fde7.bin
159b54e083b14a4d9000833a8cba1a237535cf5331b616ee2d6a8cfcd54a006d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE7 16796 bytes
font_02_sfnt_off000129c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129C3 16792 bytes