Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda431ec81dcf821…

MALICIOUS

PDF

81.2 KB Created: 2021-09-22 11:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 694553791bf6a608ac98cb5a2a801a5c SHA-1: f0a7e68acb5c140bfdcd012c52e92f171e96075f SHA-256: fda431ec81dcf821f3233c2949f971f87d4cdaa2e3dc4776f993d3530729c8e5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=the+shape+of+water+yify PDF link annotation
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/243bd5f241280061e9f26b3c023d14c4/pumalevosemufeforu.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/59845027053.pdfIn PDF document text
    • http://carszana.com/image/upload/File/40268712971.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/18745171809.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/70294232323.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/pinemesilinigateforewemik.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e081db5b58848b95990bfccdb941e4be/13142310752.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/ruvaj.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/laxufigo.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210912012252.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/vowumifapoja.pdfIn PDF document text
    • http://afro-safari.com/upload/files/xinomafixamutujadozuvot.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/42997824822.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/lidenif.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/53901553987.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/49972867230.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/pevarobuvefat.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/41092349428.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/lorum.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/xawixujukugodo.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/xopitamijefimixul.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/wepogajudajunepupibufob.pdfIn PDF document text
    • http://imgfil.com/18q1arIn 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_off0000d2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 19748 bytes
SHA-256: cf1b651c4e75947a43f5e2686f4b59659537e733985c202456ef925e4369b833
font_02_sfnt_off00011f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6E 10468 bytes
SHA-256: cc115c6632d8e875a51ad06f3bc90d76eed3e558c91bfd22476e6119ae4bb18d

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