Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7701b9da9512db…

MALICIOUS

PDF

80.4 KB Created: 2021-09-14 21:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 68f8312b339552bbc82fd55252a7a5dc SHA-1: 983caba0e13b7abd0ce1911e70e3975ac1892ccc SHA-256: 0c7701b9da9512db87c9158cd8d45c39f096f79e0732fcb8ec66654d3d289932
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URL, while marked as benign, points to a context that suggests a lure for downloading software, specifically mentioning 'download kodi 18.9 apk'. The PDF structure and embedded content, though heavily obfuscated, are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://hoadon-dientu.net/images/files/18733442308.pdf In PDF document text
    • https://powermailer.in/userfiles/file/bojalimubuzerinasudofuv.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/potizugotorabop.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/30472216051.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/87130120139.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/2600736124.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/ziwiwojixepikivesufoz.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/34860404406.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/rijigupolixozaw.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/doximagoso.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/63748039053.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/zobalejajerev.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/77092310965.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/30899813271.pdfIn PDF document text
    • http://it-hair.com/userfiles/80892246075.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021090712414352.pdfIn PDF document text
    • http://trevorhannant.com/94632423879.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613af942d4ee5---sikavafeso.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/61815283515.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/65117230331.pdfIn PDF document text
    • https://sanagustin.cl/files/83416836157.pdfIn PDF document text
    • http://hanauhrova.cz/files/45511403630.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/63268758518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+kodi+18.9+apkPDF 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_off0000d618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD618 10560 bytes
SHA-256: 8f8843b34fc4f73a14e021c824cd4aaf3e4ad99a589cf1094c30b47de5616f51
font_01_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001065d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 17600 bytes
SHA-256: 226913d373db0bc0ef8cafd0e50e89331cbcfdeab2a0dfd88286de855facb2b4

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