Malicious PDF — malware analysis report

Static analysis result for SHA-256 8696dc6d6e54cc12…

MALICIOUS

PDF

79.4 KB Created: 2021-09-07 12:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c5720644cf2f31572d68e42574a92c9d SHA-1: af0335ce3434c83e7386f191cd6e250341adecb3 SHA-256: 8696dc6d6e54cc123546944d56a89b0af83a7deca891860c3da590f27b7baf46
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links are likely intended to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/sirjq7tq5s4s383ufpr0dsfjn6/vuwosagejapiso.pdf In PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47dd86494e---46493541170.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/59b68e5d83dfeda8f5b7b1e644cf55ca/66551126458.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/19296700774.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-8-6/20210806000239863775.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5c58328e7---kozubivuxux.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed448515a---vemozerilafapazix.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/38429561331.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/55909589876.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/f3hgokinleuqrikefmsbbfi4q6/54464273622.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/34855204431.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/todewagif.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/9150237531.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ec3bc7vng4lj9h82mm87f3tct3/4449009320.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/997e1b311229cd7b60fdf913319f07d5/59467524509.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/c4a24ec8087dec63365a64165d27b705/22637817784.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4mt9ktdpsen19bec52thf25luj/nabesipujidimegemolaxot.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/79760161449.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/uhs5dfusovtn8lrn415sgao4vm/17023407562.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/jijadasotosulubilal.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/malesomitimujami.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/80505580836.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/663coe6lekrpk9lr0ig0li0c98/nilezidutazof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ingenico+ipp320+pdfPDF 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_off0000d3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 10584 bytes
SHA-256: 4f03ae09dd3d721c2368c9a607140005b479017731fe96c087bd75b1379be1c6
font_01_sfnt_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 16956 bytes
SHA-256: f960f076df7207cef2224b5f64d35a7d1f49044a47b37d4ba37d9b8227c395b5
font_02_sfnt_off000117eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1