Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaf5351fc2922fe…

MALICIOUS

PDF

81.6 KB Created: 2021-09-17 23:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 57f5541cd2207f6fd9bf23f7bff1844c SHA-1: 436d42a671acf78dafae2742e7fcae4e4afc827a SHA-256: 0eaf5351fc2922fee7f6f16a2e41a37884fbb548ccc191193d8c44e43ca9d289
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an intent to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://bunny888.com/ckfinder/userfiles/files/xirogawuwedep.pdf In PDF document text
    • http://exoticland.bg/upload/files/files/14960509022.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/kelisejegezetoribufum.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/55965827345.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/likatobuf.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/40670200329.pdfIn PDF document text
    • https://simorgh.it/uploads/file/44374053490.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/nuparikup.pdfIn PDF document text
    • https://euchebnici.com/img/file/pilozozop.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/tudizad.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/vanusamuxeka.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/66284866471.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/11096493999.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/8548818971.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/92632921051.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/14293665659.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/98152957608.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/07/68727490975.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1612f86f37cdde---netudom.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/e9bec88a0904e1dd7d973a21f72663ec/luxarema.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/92323981711.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_04_22_26_49_7663.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/84156491201.pdfIn PDF document text
    • http://grandfiltr.com/files/file/rilodarumapanozawifopej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ghost+in+the+machine+pdfPDF 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_off0000d9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 17804 bytes
SHA-256: 57f60a397dbac2cf1fa28467d1053604a8760552da9eb19a50182bfa5a7dd7b2
font_01_sfnt_off000107e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF7 10780 bytes
SHA-256: 8486749026f76e07b2669b9355c2d87e114533a49bb2fbb5cf1696a09091e306

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