Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a2eab752aaddeb…

MALICIOUS

PDF

81.9 KB Created: 2021-09-16 11:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4861d4991b35619aee87bfccd384d7b8 SHA-1: 1ab66a2d8ed43f83a66f066856aa0d90ad099258 SHA-256: a0a2eab752aaddebd073a5713ab4ed1b25424c7e73a5b6a399ab4e8a84e28ad6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by multiple heuristics and an ML classifier. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a visual download button lure reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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://mayinmaunhat.com/upload/files/44485081080.pdf In PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xiloxunojokabukisativi.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/nosubofafopisu.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/vodunera.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/vanotokikamavopoxapod.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613aad8ac4671---nefokokatorijokosut.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/60d7dae286e7b6b0044a0a2429a9ecc7/59163051453.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210912032826.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/dasokakifini.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/tumerotesetosewev.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1630885878.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/rufelovegameduv.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88805366282.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/dezegivusepum.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132927cb8116---joketifokakod.pdfIn PDF document text
    • http://apothepharma.com/upload/files/gebimutavatogopazozile.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/65155634931.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/268c112a21a04fc018934d37cfa8c9b8/zuperopenirema.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/wororiravuge.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130088c68122---83137097972.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141e5a426d82---dutuvuv.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/tojamaxu.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/vagutatixezuzosajimowigig.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/kazukaronolatuvowem.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/88798727558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=es+file+apk+downloadPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/xazofekafifurilixoro.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_off0000d951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD951 18936 bytes
SHA-256: 6d4fd924cea305588cb47d69d913f37611742e969c056982cb4df12619166294
font_01_sfnt_off00010a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A42 10452 bytes
SHA-256: b1e88d16cbcc8c8ac236e28fd6d063592258967b648d7db63e7a4deff409e6f5
font_02_sfnt_off0001221e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1