Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea8974ca3f24888…

MALICIOUS

PDF

67.4 KB Created: 2021-09-24 13:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b66c0750e742527b6d9f293babdc4273 SHA-1: 9f01395b03c71a687d12565e71edfc10deefe242 SHA-256: eea8974ca3f24888f9aefb4a6d3b4ff6e5c7e760e45c0b6e7035a9a795583b32
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as a malicious phishing lure due to its small size, image-only content, and embedded clickable actions. It contains numerous links to external domains, suggesting an attempt to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://nenmongdangquang.com/upload/files/gelelatazesal.pdf In PDF document text
    • https://emenu.hu/editor_up/dewosetekonijivikovo.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/tofiwaxukazukowuxoxixajiz.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/gufiwevizodivel.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/kidenupame.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/73977082945.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/36356343390.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/topomikajunesudu.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/3212203001.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/leluwupoz.pdfIn PDF document text
    • http://cl-pub.com/files/files/54289428710.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/62190696418.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/9648740985.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/nuvozitaxepoxute.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/32939024221.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614170f5ce306---75398507199.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/zasedonaniruve.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/bovonevowusekokajet.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/nusonevagakanozibi.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/82434172498.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/gifidotebizibegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+play+gta+5+online+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_off0000abde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDE 14340 bytes
SHA-256: 95d81832fc816c734fe3ee7168ee418a3d83e1acb32168857ca6d9c2c14c851d
font_01_sfnt_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 10724 bytes
SHA-256: 5a2f1166e428829af2843704a2ffadf16c68bf7af6649a4299b8526eba5a1995

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