Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e993075b0f3fa1b…

MALICIOUS

PDF

69.5 KB Created: 2021-09-29 05:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 903de932e50730a3be7475f6a3a65462 SHA-1: 3b0d81304a9b1cc0b02e7e01381de6794b32c543 SHA-256: 0e993075b0f3fa1bf820ea69c5eab236ad735c7fb2b5e3d373e33596a26c3007
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. The presence of numerous external URLs, including one pointing to a link farm, suggests an attempt to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates a potential phishing or tech-support scam pretext, further supported by the document's structure and embedded content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://catamma.ru/uplcv?utm_term=bambukat+full+movie+online+watch PDF link annotation
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/zokirusopevazi.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/12770452748.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210908190136.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/1305805726.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/38423005501.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/zudiruti.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/78877707665.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/59634705343.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1855bcf04---rikukobiti.pdfIn PDF document text
    • http://gerocuki.hu/user/file/komodezet.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/4711636818.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/sivuzajafazilabamezugulo.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/lumetujikeweruw.pdfIn PDF document text
    • http://rinsacars.com/files/others/jipagoju.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/setise.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142ebaa4dc1f---labafezokexonozepeluvu.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/guwed.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/6986120218.pdfIn PDF document text
    • https://botroul.be/uploads/93272243150.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/dizezaxefufi.pdfIn PDF document text
    • https://j26clean.com/upload/files/63460882744.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210918_2BA46BAF32448DC6.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/15157191407.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/64587391625.pdfIn PDF document text
    • 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_off0000b20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20B 14768 bytes
SHA-256: f4e692b4e6d63c89f933bc01f3a096f3e0e64f1a91f788ad5dfbdb2224cd289e
font_01_sfnt_off0000d706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD706 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 10868 bytes
SHA-256: 611c824f41bad503ef4882df2a3319a345071b8d9cbd79cd5204cdb19909c23d