Malicious PDF — malware analysis report

Static analysis result for SHA-256 96159e3646b82985…

MALICIOUS

PDF

78.3 KB Created: 2021-09-03 04:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 158651a41999f00c7a0a887f40a83201 SHA-1: a34e13ed4a63dd077b5a666830526366233be198 SHA-256: 96159e3646b829856a0225be1b7389baea92fde0d0248ec7ac95a8c75696535c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095e4a2e8543---84722415736.pdf In PDF document text
    • http://wisdomtours.net/upload/file/vexini.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/67382360529.pdfIn PDF document text
    • http://scsychem.com/upload/files/wogubokomoge.pdfIn PDF document text
    • https://tpk-m.ru/files/file/50633697040.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/44813967064.pdfIn PDF document text
    • http://go-forum.cn/upload/files/gezoweje.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3278527e91---51124143625.pdfIn PDF document text
    • https://schmitz.cz/res/file/gugeja.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/moduvajeruxasexabusez.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e39aa17830a68bec13ca6ed9858fb972/nojuxovezulenojisoguvajuz.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d5994077a17c1723e25116a572aaefc5/75791372801.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/wupoxebapepemej.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ieml8lvd092qi0j7ua82e9enhk/13117337799.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97132700920.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67c4bd19b1---21288231149.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/libipixodaxiz.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/pidaju.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/vodasukuz.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f71a17f878ccf767ff16d675258d172a/24326661030.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/43365861703.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/73225746245.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/77099866764.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/21964108800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=chevy+ssr+repair+manualPDF 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_off0000d1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 16124 bytes
SHA-256: 878d733b87cf6cce3222984689f969ba4e5f383a01157dd7815458abf4d89427
font_01_sfnt_off0000fb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AB 10612 bytes
SHA-256: a206c7da40380b2e9f36ad1b4f231ec56decec2c462b76ecd9638e48c50b0520

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