Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e07bfbd17295e72…

MALICIOUS

PDF

77.2 KB Created: 2021-09-14 05:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f5d215bc775705d23f0f3182c94c3610 SHA-1: 1a81d807081d80410fe2e3dd92df20e34d7f151c SHA-256: 8e07bfbd17295e72ee8ab4fef0b6994b0e682aafb9559e85ef8b5b89904f9ceb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to potentially disposable domains, indicating a link farm designed to redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://huemin.com/fckeditor/userfiles/file/25970110116.pdf In PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/80872881939.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/27177012400.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/daboxoguluteruxagaputok.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/9f50ead2023320643335f3d522f9a2f8/fodejujuzawapagurone.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d9eb66df1---51185915679.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/66301313598.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/89735821025.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/gemitez.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/kuveluxelanuxodejujupa.pdfIn PDF document text
    • https://jss-moms.si/upload/File/54482815181.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/86289970298.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/81255559797.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/86181892392.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/xolewewo.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/galarezejukalidipalawu.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/lomolupawatezuga.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/52176453450.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/juginodagugulanojonowira.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/vawod.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/66093296634.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/89163301377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=iptv+shqip+lite+v5PDF 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_off0000c570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC570 19112 bytes
SHA-256: d90afa19f7acdb98554e33e41f431bd35629e1870440fdb09a980747ab253193
font_01_sfnt_off0000f7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 10160 bytes
SHA-256: 5c8fb975bada7c1f83da9c1351456c7342298e04b966bbfafd797cedf27bf643

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