Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae23aa0c6e89785…

MALICIOUS

PDF

292.9 KB Created: 2022-06-06 16:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 0bf9164a08a0cbfbcd1db107f1d72380 SHA-1: e84955dd8d6682d569cbc8cff1edc1621aecc146 SHA-256: 8ae23aa0c6e89785e8a626e33c2dd051df3d10e4fb9adbc7cd90aea9ec060631
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a phishing lure, using an image to redirect users to a malicious URL. The ClamAV detection and ML classifier further support its malicious nature. The primary attack vector appears to be social engineering, masquerading as a free download to trick users into visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6827

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lovig.co.za/XSRYdR1H?utm_term=lewis+vaughn+bioethics+principles+issues+and+cases+pdf+free+online+pdf PDF link annotation
    • https://rotasemenedifo.weebly.com/uploads/1/3/5/9/135985080/7218dc.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/40424636321.pdfIn PDF document text
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/sozevelu.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/tugitikosemoki.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/24319798947.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/xuwuvinamifutusu.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/gojeri-safijitenu-derisilezu.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/jefujugivazisezivunudi.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/katurufukakeliger.pdfIn PDF document text
    • https://kawokuxaletufe.weebly.com/uploads/1/3/4/3/134345859/nodugubaxo-neniv-dutajilijefi-wezeju.pdfIn PDF document text
    • http://soc-in.com/data/media/files/29732355834.pdfIn PDF document text
    • https://gopazagopib.weebly.com/uploads/1/4/1/2/141250330/ranivisa-kopupij-womud-gavavalipa.pdfIn PDF document text
    • https://syarmarka.ru/userfiles/files/xusomupizunexu.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/sugarilorekazenezor.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/1837589680.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/43209621629.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/kijapofukotosamewa.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1622dce803ea27---31304368480.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/padidazul.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/17046896869.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/vorixudakun_jimujo_gojuwakanotor.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/jozitodaveri.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/f244820afde254e9fadc854c5b104427.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/162223146b00ab---77870999174.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/mapilu.pdfIn PDF document text
    • http://amis-simserhof.fr/kcfinder/upload/files/sorosojevewanalifubu.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/ziwukibanukaraxepuviba.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00040aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40AA1 18136 bytes
SHA-256: 71cb42cb20788fecc8e6310d7bdcf77722ea538f791958b91133b477d5a52209
font_01_sfnt_off00043960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43960 11248 bytes
SHA-256: c38941adb538aa7f738618aff4411606fea13180fecfde1bb99ada8562a0c76b
font_02_sfnt_off00045356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45356 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00046b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46B67 16208 bytes
SHA-256: ef02e06da8df7c3cf3fe9ce36c89d6ecd5519a8d23eae06771d6e630d73613d9