Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bc8782e69e5529…

MALICIOUS

PDF

76.9 KB Created: 2021-09-24 22:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 767fc9af9b067b8f49bd162e72e88991 SHA-1: 169b40fa7d99325e8184914c3488f7e3811341fe SHA-256: f9bc8782e69e552964602175c46e10f204211931ed0bcd20c391a74a3aa87379
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to obscure the final malicious destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://catamma.ru/uplcv?utm_term=how+to+cast+my+iphone+to+android+tv PDF link annotation
    • http://dylogistics.com/userData/board/file/vimolisezojetifobowul.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/mepomelazawebe.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/pagarigamikinevunuzubija.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/87291606142.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/59489577076.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/30330914419.pdfIn PDF document text
    • http://generaldistco.com/images/file/wozawasomotowugez.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/45857166232.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-18/20210918140028851875.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/bufejedodoxulasifuveroka.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/561902676.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/p8v4unlvqo47coofiojhdu4l95/44777926832.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-9/20210909081534922786.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/melefuvavirubawokawibos.pdfIn PDF document text
    • http://lawngo.net/fckfiles/kinajuletevorijilidin.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/65309549679.pdfIn PDF document text
    • http://specialcats.nl/media/files/texiv.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/87911684622.pdfIn PDF document text
    • http://katachizu.com/img/news/files/makuxebovofikavaruwoke.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/96058033249.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/23381731089.pdfIn PDF document text
    • https://istanajp.net/contents/files/47638999486.pdfIn PDF document text
    • http://panova-art.com/files/file/zaseb.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_off0000c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 18340 bytes
SHA-256: fc9e0cbd1cb89cdc7fb52403317f4ca55201b2f118e8e9a0afd4bc1e2c92d664
font_02_sfnt_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 10988 bytes
SHA-256: 5a4865dba20eb4350751dc3c81dde2759e32acc7f1a5834222b49d65ead50389

Open this report in the interactive analyzer, or submit your own file for analysis.