Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9ad8e1f3734b3f…

MALICIOUS

PDF

86.0 KB Created: 2021-09-09 13:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d1cdfc622d52f5d94185478c1ea0d914 SHA-1: 80473b2f57309d61709b6e711a3ec46afe842ed7 SHA-256: be9ad8e1f3734b3fe12bcf50cd12169db76c529772ae1191a633f07c910dd2a7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://asustainable.com/global/file/451543898.pdf In PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/36357195730.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/povelonudifadaxurebowanos.pdfIn PDF document text
    • http://rs-entp.com/upload/file/wafodororoguvawuwojovo.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/60263600187.pdfIn PDF document text
    • http://moristas.com/userfiles/files/43982405764.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/vuguza.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/77776346262.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/88612806160.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/77719039601.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/66903338220.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/pomudok.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/fizazasodatukoruxawuvi.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/21964830758.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/xopodazerazedejadikatej.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/73918336625.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/niwipixal.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/bopijadowuv.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/kelisedowatatilazodubof.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/36672975900.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/81506457098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+5+cheat+codes+xbox+360+phone+numbersPDF 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_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 18540 bytes
SHA-256: 56ca6ed6ee2e3ea66f76848fddc853219716d5ef6d16c127e5be5a77e550b42d
font_01_sfnt_off00011740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11740 11620 bytes
SHA-256: 7fb840e64eedf78879dae08b2683a1f5660e9545049595aa5d50c637b49cce2e
font_02_sfnt_off00013284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13284 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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