Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f601230518718af…

MALICIOUS

PDF

81.3 KB Created: 2021-09-24 05:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0fc391bc7848ff371beeb93b2d1989d1 SHA-1: 87e1fb851cd715154132133f1de2ab2f200049a5 SHA-256: 8f601230518718afff5c57942681b139e2d00a9663ac24d0d56979df7656c4a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware downloads. The presence of external URIs and link farm characteristics strongly suggests a malicious intent to redirect users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/uplcv?utm_term=wallpaper+for+tiktok+apk PDF link annotation
    • http://avesta-hmora.boj.se/uploads/userfiles/files/9377143072.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/15090248437.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/gosumejemuw.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/13ijp3fr1va4gjr9ca9iv7pqhb/67442465244.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/nebefusatiwedekivafolalub.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/09bbe33d65f9f01ae41068cc6b3f6786/87702246861.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/88232309135.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/botapewuwopil.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/97715963571.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d13fe6c4e---xubid.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/ninanuwojazezevog.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/folemug.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/20343909825.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/vegevux.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5906180743.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/tufig.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/voxumapexixitonupupuliz.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/32432130816.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/bowutel.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/ziwedasetorowa.pdfIn PDF document text
    • http://podushka.by/files/files/52864046929.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/mixenolipotu.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0341aa5260faf136a0db5cff87cdff19/38900129361.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/vevipowodoxawujosuravaxa.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210904040415.pdfIn PDF document text
    • http://hongdacable.com/d/files/runisuxo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 18316 bytes
SHA-256: 25bc5a6c90b398b4b2f5f9fba21f6cf038367abfc1a8157bd5eba592c3ef6414
font_02_sfnt_off00012077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12077 10164 bytes
SHA-256: cce2a5bbf4153589b425ee4acca530b291943644f10a42dd27596a0adf947c2a

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