Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fefca1a9e642fd3…

MALICIOUS

PDF

68.9 KB Created: 2021-09-29 13:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6252f6d92766eb75b565148c4ffe0dd3 SHA-1: 2f67bec586e10cfae2bd9057e922c21751a1a2eb SHA-256: 1fefca1a9e642fd3a29e4dfc8b9603851b288d652e321b8f756a426a2fe30cbb
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple links to external URLs, some of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript and external links suggest an attempt to download or redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hyundaihungthinh.com/uploads/images/files/xujovazepopox.pdf In PDF document text
    • https://ocw.tw/uploads/files/91588740694.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/76994648956.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/42145830521.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/21828815992.pdfIn PDF document text
    • http://capri.lt/userfiles/files/dokedizibol.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/timolesujosivofupavure.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/34573703586.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210918_9B930862AC88B2C9.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c74d52714d5246ae5b349d822406f8cd/41103989674.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/lerovinixogedew.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/domeze.pdfIn PDF document text
    • https://sme.bankai.lv/ckfinder/userfiles/files/5096690444.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/rajim.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134f1f8e6ca9---dijisototuvojuvomi.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/budipabekelez.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/gixekosuwokux.pdfIn PDF document text
    • http://osayit.com/images/file/24127968837.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/tejofolus.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/31014496432.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/1p3p05osji1vk3s87l56mb3ok1/walotetoxabomupapuv.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/mokuxazipedunumosutezofu.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/kodikajilemifujevus.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/4776582862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=apps+like+vlc+for+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_off0000af1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC734 10652 bytes
SHA-256: f1d87d2edcbbf87007200e9988a89aa810af9b4cfd1f0646f5cb88ab9c66a545
font_02_sfnt_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 15440 bytes
SHA-256: 0762b225a8c46ee42889cd88a4d02578306ac06f0fcfc72af88cda8cc66feae1

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