Malicious PDF — malware analysis report

Static analysis result for SHA-256 858372ac212b6ede…

MALICIOUS

PDF

87.5 KB Created: 2021-07-16 13:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24a56268860b218fbc551e6038159cab SHA-1: b8165ef88396695b2cbc6e7ab689330c3784ee73 SHA-256: 858372ac212b6ede12cb36784063b00c1d00ec48b4909cd9e3b2d6a3abd01624
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://imcborivali.org/userfiles/file/48465267406.pdf
    • http://andrelandberg.com/userfiles/file/zimemetibalejezawasako.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3et2lnrfosjod60180nt1qp17f/64339273798.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/l0h35qgt333bbj53takl53q71e/81737059645.pdf
    • http://mg001.cn/upload_fck/file/2021-6-22/20210622000559369229.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/5a8b30d3e445b08a4c66e6fba90cbd5c/83227274434.pdf
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/rapet.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7412851c---sojebijokajogu.pdf
    • http://luatsutiengtrung.com/app/webroot/uploads/files/22445212645.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/46857258227.pdf
    • http://baloneacessorios.com/_upload/file///12559543523.pdf
    • http://jhdljz.com/userfiles/file/1625420668.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/7c2ea6c700b1ca87664b84ee5421a33d/fawog.pdf
    • http://elfuklid.cz/foto/Image/file/48404873181.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609424a46f468---83861165951.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab91b7f682---taregimopoxerusozeku.pdf
    • http://korvet-sp.ru/userfiles/file/78488299895.pdf
    • https://bachson.net/upload/file/dujepalulobaxal.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/2gif61skj5hka1q31dtpakl296/tiwododuribetotejavimap.pdf
    • http://mail-ex.net/userfiles/file/gexetipeledozexojoguwewi.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609538adaad9e---70727129251.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c30f55547---xazenidiz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=in+the+realm+of+senses+subtitles+english
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e8.bin
246019f0028ad55a8458a9200e737877e007d84eed172288d428028383ff7e8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 18252 bytes
font_01_sfnt_off00011479.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11479 16792 bytes
font_02_sfnt_off00012c90.bin
cd3c7d5bcda2d0dcd9d6fda38863bfff6d8ba6999657ad82da4fe2606747f00c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C90 10852 bytes
font_03_sfnt_off0001455c.bin
6b0020a899f9d1476d014bcf0d71f65c8c31ca4e92ce29e13c8769dae9bed71f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1455C 2436 bytes