Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e15b367bc6890f8…

MALICIOUS

PDF

70.3 KB Created: 2021-10-02 02:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 99e21c98d99a4988e8b1a461a1a85e24 SHA-1: 0cace156022f53de538255c7c4da3d875273b625 SHA-256: 1e15b367bc6890f8705e28b5a8a25f520507e11b678d52bc25eb75534263f978
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, strongly suggests a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to lead users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://veszpremlizards.hu/_user/file/lalojoloveguwefakowexi.pdf In PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/14761891682.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/73374805523.pdfIn PDF document text
    • https://thermaltrailrace.com/imagini_ws/75089279223.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210913103121.pdfIn PDF document text
    • http://alfamar.travelshops.pl/userfiles/file/kamapidoroturita.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/66589156550.pdfIn PDF document text
    • https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/niganiwuwipomudefufiz.pdfIn PDF document text
    • http://www.truca-taoules.com/ckfinder/userfiles/files/jamajarasugunorijobunu.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/fezunajetiluwotudolibo.pdfIn PDF document text
    • http://ed-union05.ru/files/file/17016323615.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/38756963397.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210907_369338764B16D935.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-10/20210910221141661453.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/95284731756.pdfIn PDF document text
    • http://badgerhillfarm.uk/94072048430.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/xutojomijimizodavelita.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/34838658809.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/90856280147.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109120508487131.pdfIn PDF document text
    • https://tuyendung.tlipgroup.com/upload/images/files/58275562306.pdfIn PDF document text
    • http://watch62.ru/files/files/kaxumomarifamopisajeta.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/2883722489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=baixar+video+do+youtube+para+androidPDF 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_off0000b0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D2 10744 bytes
SHA-256: e2314c876b7fcf7ab05ac4768f57a0ac74713e7c6d45fe13c87169b2ff760a0e
font_02_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 16516 bytes
SHA-256: fe36c6da15f7c20cba78fbd7e29ea92378985fe90ac5b788c9341275faa3cafb

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