Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e0484e8ec9f0b6…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 19:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34a41ebc3102c7ab65ba2c7713e3e429 SHA-1: 4faac5db899881fbf3c55916776d661c7fe1f865 SHA-256: 95e0484e8ec9f0b67655494d10cbd4fd44acda832d0d428eb5820ea5dea95277
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests the document is designed as a link farm on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://huntic.ru/uplcv?utm_term=autonomy+as+an+ethical+principle PDF link annotation
    • http://vitacanes.com/uploads/files/22618612244.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/fcvhm8dutn3facu80nvs9pe7o3/38642638011.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/18519444455.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4e8263eef---puledarurawuzudamabux.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/18080069274.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/winibaxobuvevo.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/kewogovixojuzu.pdfIn PDF document text
    • https://advik.net/userfiles/file/96477757109.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/61878212207.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/zipamivom.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/53216712481.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/lavofitufenagejebozena.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210904025358763.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/85193192701.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/vakexarigikiregu.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/74517920964.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/feratexosefuredivuxum.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161356ba5bdd40---badajeseja.pdfIn PDF document text
    • http://atrsara.ir/resource/files/3263550523.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/2471440029.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/82502426136.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/64283471746.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/wupamutizosifimujodasuzef.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/54723178697.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/8908918592.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_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 10836 bytes
SHA-256: c79215ac5fc36f19fa4dd457635c7b3f4c79426a4541ca5586879e36fc58989f
font_01_sfnt_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 17832 bytes
SHA-256: 7c449b4f7a655954ac67d42326ae43216b34ec38d194b18f1c87fd22f378435f
font_02_sfnt_off00012112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12112 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1