Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7091ae3645840b…

MALICIOUS

PDF

81.7 KB Created: 2021-09-06 20:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6118b3103b32ddc652a27cefcfa90878 SHA-1: 9154d29115df124858b7ed4134b22c51c4f8c66b SHA-256: 5d7091ae3645840b262fd975c8b5ced8a889661f587cd10b19b7eba58b6b255c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external PDFs hosted on compromised websites and disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely designed to impersonate an invoice or payment request, further supporting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ketchas.ru/uplcv?utm_term=fastway+packages+list+price+2019+pdf PDF link annotation
    • http://www.binghan.my/userfiles/file/11958400221.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fca4513c690---69650487394.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607248e49ca50---vojalawib.pdfIn PDF document text
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/3402550856.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/90225904849.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/8924151960.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/01c288d6db68f8b6264443970044a0c0/xelafejuzidoxupifi.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/ae269ca903fba09bfcb013a3376d86ff/1663023042.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/lujozafewugutuj.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/fljn90bud2b0ccfbs4pshqk1l5/pizoxo.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/82bb1eef63b05d20bf3fe2b36a6507bc/4027533848.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/ba73f66aca400fc78ef2ec21d8672e4c/memebagovaxugetomorox.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/89196151558.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/pufilalo.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16107da0527792---nitosovibofisuwe.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/rozinisanafozelarifuruzu.pdfIn PDF document text
    • https://immobilgold.com/file/zoxegaguk.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xabif.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/11889271406.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/druupfq1kpc1h9s2fg54p8e3gj/zoxojusuvusadobuxiket.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106090210.pdfIn PDF document text
    • https://wonkingchina.com/d/files/50611650155.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9kpk9s9n1jckhea87g2f53d5el/42231773714.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-22/20210522163104765764.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/10768784642.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_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 11304 bytes
SHA-256: 69cf7c95c46e116332444aeb2ed6355d31904e13643df0241f6e073ad89db6e0
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 17324 bytes
SHA-256: 0d0bcf1a17b184193e9f10a4f1177593f3e37f3bdee432c31cd75bd70542fd9d

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