Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9dbef34fc35173…

MALICIOUS

PDF

83.3 KB Created: 2021-09-04 09:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2c9b446ee8f7392eae42042689638e1f SHA-1: 71641e3ecd9af6c684a152d18cc49c04945f4a4a SHA-256: 2d9dbef34fc3517367f02b84e5a10ccaedbbd973b559311ac630b381051c7154
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://ketchas.ru/uplcv?utm_term=manualidades+faciles+para+navidad+para+ni%C3%B1os+paso+a+paso PDF link annotation
    • http://atek-ent.com/upload/file/fuduvufabevek.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/2ivkalt5k1n9ka6iit6oo9qpnr/23008419000.pdfIn PDF document text
    • http://santabruna.cl/upload/file/21304274635.pdfIn PDF document text
    • http://sapaethnic.com/webroot/img/files/defumip.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/satakozaxifaput.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/pekemojolugabowamo.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/lodaruxepoxulezoxad.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca56fed1e1---rusurimatoju.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/pawexadafami.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/dupidurev.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/renubosa.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/52227336517.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/medenozopudixavelux.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/jopujawawujinoxomebowonu.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e9fb3a59efab211d976a8c8f1ae32648/28886028461.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6574052d17---petuxozijifejojusuku.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcf39dceea---gisakojawalubuma.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/vagexazaxetobake.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e365c9bac---30779491730.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e245d3661f---vozexut.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/83607980011.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/23820733222.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/xagug.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dce42d154---66861218771.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/7c75b756b03ba310ad0015203b66d0c4/tasalipibij.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_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 18180 bytes
SHA-256: 7220678d522cb0d24793635ac65cc34b7adf2f5d3bd353f8e465219b01854ce9
font_01_sfnt_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 10880 bytes
SHA-256: 0d61bfd0eb06ba432f10fa355f33a07b05dd63342a94d4b1f5350981b23a5c28
font_02_sfnt_off000124b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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