Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0500f45b1e711d…

MALICIOUS

PDF

85.8 KB Created: 2021-09-10 20:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8db1b8435fdf886c9429574b4ae04779 SHA-1: f7e9e5892038af5acae52f9da92a73cbd3468576 SHA-256: 2f0500f45b1e711d0095c66a8be3de316e0d45a7f7b70b527b66c283753217a3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs suggest a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the nature of the PDF and the presence of external links point towards a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • 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://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/48114639100.pdf In PDF document text
    • http://mingmitrcoffee.com/user_img/files/mudadafowisemekafazaf.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/tunafaxologumameg.pdfIn PDF document text
    • http://artospace.com/pics/file/bewikirupurepawutej.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/xasasofisopowidep.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/31174024989.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/1025226277.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ff31704bf---batob.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/85286485415.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/pomemugumedujo.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210905120146402.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/kelarobedera.pdfIn PDF document text
    • https://redac.ch/upload/nejaparosoleboxo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/bibotisefosetimolo.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/figuvab.pdfIn PDF document text
    • http://geyuping.com/geyuping/uploadfile/file/2021090509104273499.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/5613708154.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/xadiligofenosidutibeve.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210906_9A7D522118CFFB99.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/tigowilemo.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/59714348012.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/60272587207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=movie+maker+app+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_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 10392 bytes
SHA-256: 69ae4bb44659fdc34f04fd8ed9175a3d2893b5c9702d11b73f82ddfb0cdc2299
font_01_sfnt_off00010453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10453 17656 bytes
SHA-256: c726bf43f95a29cc0c5caddda5effc1e804b112934412fd6f4ee1fd5429546da
font_02_sfnt_off000131d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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