Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebad36561095954…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 01:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 09f122bcfc94467ba94bdd9f38783300 SHA-1: de78bc486392a2001f4da1571cd49b6722cc707c SHA-256: 8ebad3656109595452ffe67e9e55317dcab86d70d2a33ffa5fad5dcaa54f4a5b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, many of which point to disposable domains or IP addresses, indicating a link farm designed to redirect users to malicious content. The presence of multiple PDF_URI heuristics and the ML_NYX_PDF_MALICIOUS firing strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://philabc.ru/uplcv?utm_term=how+to+move+videos+from+android+to+pc PDF link annotation
    • http://pribatu.lamilagrosaimport.com/images/files/45754232483.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/9770009780.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/guviwexinesosokagivugikup.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/72641998969.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/regajuzo.pdfIn PDF document text
    • http://shendaoguoji.com/data/attachment/file/fonanepunakotekubotab.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/wexiwom.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/90369751469.pdfIn PDF document text
    • https://triosms.com/userfiles/file/zikiz.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/28240606524.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613f15cfb95d5---vedixexivalukoz.pdfPDF link annotation
    • http://daindnc.com/fckeditor/userfiles/file/8711820154.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/37494815552.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b16fc991afd7055b0208a64244e607b7/pirofoxovovuk.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/birefuxox.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/10101607198.pdfIn PDF document text
    • https://masukpt2.com/contents/files/79169376439.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/50556862199.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145084ab8dac---wanufevanejapi.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/kemakif.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_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 18160 bytes
SHA-256: 43796ef7f1f4a45135a5d68f3a317fc5efbc6a200ab14232c5c729d906213bb9
font_02_sfnt_off00011d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6D 10880 bytes
SHA-256: aca965833850c2dd7aa7935fc574748f3f21dbdc6650fa7b6772d54cd459c109