Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e28caff0e076ebc…

MALICIOUS

PDF

82.5 KB Created: 2021-09-22 09:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 534d899c3e83ac4a053fbc9671b39090 SHA-1: 144313c0d7001c6b920b9f29605f5cf1a47ae957 SHA-256: 9e28caff0e076ebc3b4dcb4c9095ed89a2751a43734b667cb8320ea7b378e615
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious websites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the numerous unknown-reputation URLs suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=interchange+3+fourth+edition+workbook+answer+key+pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9d03e6921---94570915936.pdf
    • http://fandimnarodaku.cz/upload/file/38395711894.pdf
    • https://nmcs.ca/userfiles/files/zexoxovoxegumufoxalimel.pdf
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/86669637278.pdf
    • http://enovosti.info/ckfinder/userfiles/files/53494399996.pdf
    • http://cwesp.biz/upload/file/75454807021.pdf
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/rimonaxiseviwud.pdf
    • http://synerfreight.com/syner_upload/images/files/41976509942.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/493n9rhn67u20mpicpt0dk2649/38761784918.pdf
    • http://noospc.ru/SITE/files/editor/file/pizob.pdf
    • https://fratellifurloni.it/file/kowuweligolapenotereza.pdf
    • https://gazeta-msp.pl/user_files/File/21931593695.pdf
    • https://ms2gacor.com/contents/files/94972294477.pdf
    • http://vers-ma.de/userfiles/file/wotumejawiroku.pdf
    • http://scuolascifondocortinadolomiti.it/userfiles/files/fugagosakoguvuwuxes.pdf
    • http://www.ufolep-69.com/contenus/files/suxopawebenomolizawuvo.pdf
    • http://shopcloud.cloud/ckfinder/userfiles/files/96989251064.pdf
    • http://przyrodnik-kujawy.eu/userfiles/file/jedazelixelisadaror.pdf
    • http://edbiji.com/uploads/files/20210919090944_891165.pdf
    • https://rumusjitu.com/contents/files/rulin.pdf
    • http://abpaluso.com/upload/file/voroxupetimaw.pdf
    • http://www.jasfec.com/imgs/uploads/fufepibuxeriwawi.pdf
    • https://groupunsur1.com/contents/files/1329238675.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_off0000ddf9.bin
d75a59acf35f35c399fc8a01017ea077b4592d196ae50c0505d162a321a5a618		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF9 16856 bytes
font_01_sfnt_off000108e6.bin
9b5ba223a2f8ad0197b9ac02003b16b81b2503680b59bacf28facf5a7f4abacb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 11508 bytes
font_02_sfnt_off000123d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D1 16792 bytes

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