Malicious PDF — malware analysis report

Static analysis result for SHA-256 29013c7348f298b0…

MALICIOUS

PDF

86.8 KB Created: 2021-09-19 11:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 474cd30941c8433e1d66ffb9aeffd675 SHA-1: 74ea2c3f0a67708bdd6903a84e23c873bd1863b0 SHA-256: 29013c7348f298b0c90cbbf75fa95eefdcd46a4cd3a44fd10d7c52b97556d235
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting, indicating a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to lure users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ppuhperspektywa.pl/files/edytor/file/mevukejelo.pdf In PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/dowozajipidetami.pdfIn PDF document text
    • http://glassick.com/userfiles/file/bijemaz.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109111029325180.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/6217702470.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/77854685070.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/sugekogiwaturazos.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/lopajifude.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/vitowemutuw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/25203979080.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/godagiwagulebojuwiragenon.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/kagubabamodiro.pdfIn PDF document text
    • http://ewtch.com/upload/files/sopujoxuze.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b750826880---kulujerekopavazoxazi.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/73627119247.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/famazebazasadisizijexegu.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/risotavabisudo.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/gutanewujopupikiki.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/39562582744.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/rarimevebopomokuwofojebig.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/99612033078.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/suzerirefexutibawogelig.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138028a9a4ad---41765399051.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/41146532283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+publish+game+on+play+storePDF 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_off0000e9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 19468 bytes
SHA-256: dbda359070865572069413465d62289aa61142f3998ad48e17a244f0112cdcd8
font_01_sfnt_off00011be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FD 11132 bytes
SHA-256: 76d871523a8e9ac3687096529509cdd13a10979516ad4571c407830c3d081705