Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c122f9d8e01b315…

MALICIOUS

PDF

84.6 KB Created: 2021-08-14 02:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 85f1129bb92b97f3bbda14153ecf8a42 SHA-1: 913d4545230c6ceb84865344c38a17d61a4dd995 SHA-256: 0c122f9d8e01b315b12fc0df15241045bddefcc687e6365e532e45593e1d49aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution attack pattern. The presence of numerous external links suggests an attempt to obscure the ultimate destination or to leverage multiple compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://suttonoakfarms.com/clients/880813/File/jebawimilareloxag.pdf In PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/uucdrrf7hhnn5jljss2c060c2v/tugoge.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/21472280756.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/52448507133.pdfIn PDF document text
    • http://scro.ru/pic/file/51224500953.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/lavuxiposofajugi.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a9f353c62---22404597960.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/84507793775.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/76503106492.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a449b7a4c47---87601134889.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/roblf62fgsqbjncuel8luvgc45/kexomolez.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/monofoginavaninug.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/10947530005.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/911b9bb64115726a6870c0284174d1cc/69918870038.pdfIn PDF document text
    • http://didopack.com/files/40643288799.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/givuzegazisezaja.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d21d7fb3e99---55014833498.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/luvixupalobasipotaxa.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be32647ef---76244814053.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c62f0494d8a---liguzixaxowokatatak.pdfIn PDF document text
    • http://haai.org/upload/file/16376698261.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb0a397c68---40516067844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=seven+continents+worksheet+pdfPDF 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_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 17260 bytes
SHA-256: 6fa4ab2a25bc4eefd8973d54bfb01f3669c91dcebb8d213066209d68ed2c3fa6
font_01_sfnt_off00011472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11472 10828 bytes
SHA-256: 5cecf83f704de4981beef6951d153835ed68b9159eaca22c242323d46f6512c6
font_02_sfnt_off00012d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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