Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd5cda4575f2947…

MALICIOUS

PDF

96.9 KB Created: 2021-09-06 17:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: af5341a4b027a829dffd096a01a57e66 SHA-1: 8e64d5e3bb281e08015a2b5c505b046979421592 SHA-256: ddd5cda4575f2947a4fc42404fa7368d92a5dce8fb7d31b163794a225a81ec2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://wastran.ru/uplcv?utm_term=managing+tourism+in+south+africa+textbook+pdf PDF link annotation
    • http://www.lugashotel.com/data/editorfile/xuxojalitenozapoverekugux.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2036d89ce3---vinokexinagudiruwi.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/mivupagelefosux.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b56f22fa7e---61660060592.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b98b2c44442---52635979445.pdfIn PDF document text
    • https://robertbah.si/files/file/xaridoxinazutabodawewubew.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///26772175164.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7156bb9d156b757eff090fef933b7aab/fusamagazalolapimesareko.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/puzemiduloxakogo.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/zefebu.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/majogonibusikedizejigome.pdfIn PDF document text
    • http://bamila.vn/luutru/files/7638852729.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9ed3eec11291d46ddf7898fbd7bb9933/13407554078.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aca47752548---42978441715.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/36c561f2ea3ef154639d5a90f4095993/98604361559.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16072c64832bb7---nuzizawijevemiloli.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c8293c1fe---nasemixid.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/60163217661.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/37078548219.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/mavakega.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/a29cddecff455fcb2189a05edd024f49/55911283214.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/jujepopabelazazuzevexuzi.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b66eba4bab3ec600a7df3f03789cfde3/19302091954.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210718190204_i03wfa.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/19fa66f76509ca2bcc7ee3eb61b50ef0/31731393252.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_off00010fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA9 19312 bytes
SHA-256: fc4bd06155ab36b67768294c9a36f9af60c3fd752242f06f90e8b94de31dc282
font_01_sfnt_off000140c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C1 11448 bytes
SHA-256: e2fba985de8bfd0ecb5f4c6e3c634dee5ede348cf39a8a35626736abe24b2dac
font_02_sfnt_off00015b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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