Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fdf003f1146022…

MALICIOUS

PDF

84.7 KB Created: 2021-09-24 01:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 85583e665f6055139661f14579836151 SHA-1: 75cdba92fd589ac0b76e74f7c8f08624d951b220 SHA-256: d6fdf003f1146022ca0d1b597a94ee3fa9fe0f5e777e4a324200a084db1d3ae4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://hexema.com/FCKeditor/file/janoras.pdf In PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/masabalanekifizuk.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/bofav.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/62756081037.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/86411452883.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/82028074956.pdfIn PDF document text
    • http://ckud.handysociality.com/upload/files/15085967185.pdfIn PDF document text
    • https://taborgospelassembly.com/userfiles/file/xunotebola.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/54474541883.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/nopiwenawazadukexerunav.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/bajisogota.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/25366891291.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/loxiwunizu.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/82242437640.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/26577757245.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/seserosogamom.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/76776714222.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/50336370449.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/lojamanezowu.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/zofiwidikejosab.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/junuwobesegibewalovo.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/43915877652.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/58171892541.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/17317898541.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/suwizudagunawijilapawu.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/94890201185.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161437c562c794---dorejijuxupabidatujok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ocean+king+2+apkPDF 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_off0000e53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 10256 bytes
SHA-256: 6d3f26595e91d7c7bbdf8c57d9aabfef77b3304e842797a65d4fcdf50c6a3b43
font_02_sfnt_off00011496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 18500 bytes
SHA-256: 72148feb6eb9997ac22af3bdfaadfffbd8f2391b73ee59365023accef9555b60