Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b3c76591cf3a6f…

MALICIOUS

PDF

88.1 KB Created: 2021-08-08 21:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1322c13cf09e7a5f443ab5ed2dd8fac SHA-1: b8dce5d2ad14a8a98f0b5169f1cbb14102bc06e6 SHA-256: 02b3c76591cf3a6f7a72dea2b21b98c1bba5221b6f4eb098986498b32e5a2a64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/298b19f4ecf447ae4a2fffcade20e66f/92292030549.pdf
    • http://schokobrunnen.com/idata/bajuso.pdf
    • http://rockhouseschool.com/rockhouse/uploads/files/71824090607.pdf
    • http://fizjoactiv.eu/Upload/file/vededefetavatulivop.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/79804017466.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c443ecc0be8---36059923266.pdf
    • http://ahkjt.com/upfile/file/61327766238.pdf
    • http://caratow.nl/userfiles/file/kuvamesafefezegizunogom.pdf
    • http://ahcxdq.com/uploads/file/021123352928.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/68172522778.pdf
    • http://www.contectrade.hu/fckfiles/file/tutedosudovofobetovojo.pdf
    • http://italianopizzeria-pg.com/uploads/files/79409186622.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/1fdbpdlrv4canoc4kuijvhk3f2/29309864470.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c69028541---52253401727.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608e435ee165e---54972152862.pdf
    • http://automotiveenergy.cz/userfiles/file/32415870144.pdf
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/fawubite.pdf
    • http://avanti.pl/userfiles/file/27110339431.pdf
    • http://vivatbacchus.hu/files/file/metomisubosidumiwidik.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b426e5b2c75---55031066084.pdf
    • http://gorisum.net/fckeditor/upload_file/file/fafeti.pdf
    • http://cgl.lu/userfiles/files/342889251.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160beefe6682df---kemimiba.pdf
    • http://crm333.com/documentos/file/xejuxibizamilemapajidaxe.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/7crgc47tc36mj5rjratq14v7qt/sibarabinefapazafuvuzatak.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ejercicios+de+comprension+lectora+para+imprimir+secundaria+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_off0000eda3.bin
0237c660deded58650186afe1dfae035aeb4d59a2670fbdc2048080993eb6604
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 18800 bytes
font_01_sfnt_off00011d76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 16792 bytes
font_02_sfnt_off0001358d.bin
f212dd12649353810e3d4df852b8a944fb8234d932f6bc4aab3fcb889efbffc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1358D 10992 bytes