Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e5697f7268d488…

MALICIOUS

PDF

72.0 KB Created: 2021-09-07 11:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 473c0a7da0389b8f6839ac270e534aba SHA-1: 9afe6838b5baa8ec6f681868d0fadded6cb0415b SHA-256: b3e5697f7268d4884653dcda7b9ab325f8b0e103279e3987091f2b323e431361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or downloader lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce3c690c8---najavoj.pdf In PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/nisimidotuninojalag.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/sumezasuladedesemetuf.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ae249757d---wedebekubefapasubosaj.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/gfhham3pmi2uupsgjso28oupma/24606221440.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/folegapat.pdfIn PDF document text
    • http://novichiha.ru/pic/file/35446311136.pdfIn PDF document text
    • http://honghuibio.com/d/files/84939427282.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66b8d9db23---69958683784.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/bijikegijakikoxixovo.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/6er1dcbohj56uc96kfei2h4jcv/82146588233.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/jeturuxizikulib.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/74021986610.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607127489e107---rasafedinuxuzewoderap.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/57570830423.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/kiruneruzumepof.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/5838800243.pdfIn PDF document text
    • http://join-angel.com/ckfinder/userfiles/files/rajujovidugimex.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc662535ae---doneviwanapiso.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/zikizo.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/lulusaripo.pdfIn PDF document text
    • http://qachs88.com/clients/58271/File/38839926788.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/8ilang7jff1np7mlk3bbpaipg5/45367203579.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/202171742371867.pdfIn PDF document text
    • https://bloomeng.com/uploads/konepit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=class+12+computer+science+c%2B%2B+book+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_off0000bab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C5 14980 bytes
SHA-256: d30fc2faa496f2676f0ab7da654c673ed834477444f6f097ae4d45c5a269eaee
font_02_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 11316 bytes
SHA-256: eb54fb7b71c8d6ce679bb340cde03cca8fb547362ad860e141ef6bbb02bcf9ae

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