Malicious PDF — malware analysis report

Static analysis result for SHA-256 1432c58b0337e746…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 14:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 03f2dd7e0b2ba64406c15335d67e5480 SHA-1: 38ceaaa30f1ce0c0d93a44df2e8788177858cce2 SHA-256: 1432c58b0337e746dde19e97dbeccd2f569b7b6f705898f5e82fcd1c6603e463
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external, potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/o206ikf51pebdl6iu85qspklgg/sotezi.pdf In PDF document text
    • http://legend-chang.com/UserFiles/files/tepufedosasamurisanobim.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/872fd31205b1110616bbdb77a1466635/72700024006.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/38349465583.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/01fth89lbpi2id9a4qqsonv8id/sojijulikezibonekenaj.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/9p1m9r6shof9jg6a841qhseabc/fufisilosofare.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/31034297567.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a087d0941---46770315254.pdfIn PDF document text
    • https://ak-oroslavje.hr/files/21145261061.pdfIn PDF document text
    • http://copy-office.it/userfiles/file/bixowebowijedun.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/81291148112.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/53192755579.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60F27AF831796.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b6571b990bf---2068010533.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/95242424302.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4d6633bd083998ceeeffec0c6852ec8b/xivoxo.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/83605245682.pdfIn PDF document text
    • http://www.sanruou.com/app/webroot/uploads/files/96024224309.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/9ba62d8c0387df3effc2ce648451687f/bujopaforirobewijoxoxoku.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/62740664632.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/cededbd6c95d0a78ce06fc37b5bfa8fb/50347753903.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///8202716238.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/fenqdg9hsgn990v173rq0rh3ec/raxigobona.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/0ec7bb9844dd083a068307463f5d0813/nenalimilamarunaxabasibep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=soda+3d+pdf+reader+fullPDF 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_off0000db24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB24 18964 bytes
SHA-256: ab5b303b7a26a0a70e3281a3716d93edfe68d151c4c22676a33a3c5ec1641974
font_01_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 10376 bytes
SHA-256: 9e6fe143d252d41de5bceefaedff8e21f87be0f3bb0cde8698e651b6f70d4c2e

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