Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a565b8cf70d5925…

MALICIOUS

PDF

74.4 KB Created: 2021-04-17 17:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f05a0f28c4fd0586ef9a3c042661992 SHA-1: db56f3b07b88272cc0c1f0771344fc71206ad106 SHA-256: 0a565b8cf70d59252e7978a68d739de4278fdfe42942bde195e22b3a37b946a3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable link farms, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://www.termis.org/system/files/webform/vomijalikuwukilowerosi.pdf
    • https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/87762274679.pdf
    • https://vectorcorp.net/sites/default/files/webform/resume/wogudodijanaferewinige.pdf
    • https://ambrose.edu/sites/default/files/webform/seliruni.pdf
    • http://www.pacificsportfraservalley.com/sites/default/files/webform/banofamuwidobekoke.pdf
    • http://www.friendlycc.com/sites/default/files/webform/zuguxinukebezukul.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/setafemamuf.pdf
    • http://www.friendlycc.com/sites/default/files/webform/topevonizudurazot.pdf
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/zizepuniket.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/geguridafaj.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/66890294103.pdf
    • http://www.pbttphtk.gov.my/sites/default/files/webform/fadubapep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+tighten+chain+on+husqvarna+55+chainsaw
    • https://community.princeton.edu/system/files/webform/setokan.pdf
    • https://gradfutures.princeton.edu/system/files/webform/ninavixokamorul.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b8.bin
b0da98a3a9f0c43017b7f9b022c7a0ee308d6a08542016fbcbc1e2fcb445d171		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 5392 bytes
font_01_sfnt_off0000f72c.bin
e538226d9206eab77567e3a6e1bf2311e9280a02a7ce4b74229acb95fb545d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 11260 bytes

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