Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca60777d5eab03ad…

MALICIOUS

PDF

73.6 KB Created: 2021-09-12 01:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e487f464a39f0eaf0612897d1fc8d91d SHA-1: b76e5ed35a3ab46022348ce9107318c67f559b54 SHA-256: ca60777d5eab03ad60a84508e8f21fa62a18e7ec1e5edc88501d66816f45895a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are structured as link farms, suggesting an attempt to obscure the true destination or to host multiple lures. One prominent URL, disguised with a 'utm_term=download windows pro 10 64 bit iso' parameter, strongly indicates a social engineering tactic to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lexen.ca/userfiles/files/88816356217.pdf In PDF document text
    • http://divorcefinance.nl/uploads/file/96934468879.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/1490128804613baec208c94.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021090204485473499.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/tugesikona.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/14385603626.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/29162556872.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/lenoxipavovotevutabebid.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/13563310483.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/25249452527.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/vodebugezidivaxu.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7c3266ed8---60492278167.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/91265945267.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/46358162347.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/laxexenunidafekapuv.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/palirilarikeg.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/33099300295.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/xitibitolepejodi.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/50798613309.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/tujexirogonuxiwuvusope.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/wuzogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=download+windows+pro+10+64+bit+isoPDF 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_off0000bddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDF 16272 bytes
SHA-256: 00d4b4103f6d7edacf3cc9c9d90b1d94a13977f6665e5ca7f7c1db19dcffc886
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 10900 bytes
SHA-256: 51a2fcf8b7eafbbdc97aa662f903e926f1894c175c89d16e01ad1b507c8a808c

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