Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc082497f27ddf6…

MALICIOUS

PDF

74.3 KB Created: 2021-08-25 11:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 62f6be9c0179987fb114d915734c8bb1 SHA-1: 53b2afaf297f268640c76f5d59be69129c55420f SHA-256: 7bc082497f27ddf684ad599d6e0630196ce5b5be9d92b88c57b928775e9870a1
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress sites or other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The presence of multiple links on compromised or disposable domains suggests a tactic to distribute malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://tycoonmedical.com/userfiles/file/81312484277.pdf In PDF document text
    • https://yptea.com/data/fckeditor/files/80101041590.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b91dc1574---timodopuvufukanetumu.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2795817a16---dixatanunirimaxog.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/6de02492c97e78ddb113025a759be1c7/83614762312.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/8227d1014bef51486a3209771952c082/76364006173.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da53da5a1f---41184878263.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/fipipixikejuwiva.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/jafebomuzedawewuxexuwe.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/69459d96ea00aec00887c3728613c4ec/xuzolugilowavev.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/7384311477.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/tulab.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/tidilizowef.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/sonijofokotujezaxifab.pdfIn PDF document text
    • http://metapolar.hu/tmp/98935883609.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/mrsjnhsu9hb4k6bljlp7ogq3pi/27123943170.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/73675211978.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/bcaddb2f468363d89165c81c51d3d0dd/wolegabat.pdfIn PDF document text
    • http://metall-press.ru/files/51315337802.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/lisilamovulal.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/sokinitadebudi.pdfIn PDF document text
    • http://kadet-ck.cz/pic/file/degezazulolezajajoxudifen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=murder+mystery+two+value+listPDF 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_off0000bfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDE 10664 bytes
SHA-256: 5083bc97b0584432e8617af5a637d624943e7e087a7ae7f954057f54acf48c1c
font_01_sfnt_off0000d870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD870 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 16464 bytes
SHA-256: 1edf2973cdb13341ff0554ab5878ed269f756e7cae6d3b400c90a9782208c79a

Open this report in the interactive analyzer, or submit your own file for analysis.