Malicious PDF — malware analysis report

Static analysis result for SHA-256 8418a75ee68cf3ee…

MALICIOUS

PDF

116.5 KB Created: 2021-08-02 14:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4c382e0bb4be7ca9691f33a69bbba1f8 SHA-1: dc3847875f5a9a256708c5dbadbd2912a728450d SHA-256: 8418a75ee68cf3ee1c095e047ab33f8315f6a8502749d1564f8b948ffc33af1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised websites, indicating it functions as a link farm. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9842

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
  • 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.
  • 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://infrive.ru/uplcv?utm_term=minimo+comun+multiplo+de+6+y+85 PDF link annotation
    • http://www.celso.org/download/bofoxirunolomoguge.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9d7936db2---64441257908.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/fc4ca5bd5abcb6cc312a5b500217ba06/tevobisafipomozixore.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828001c181e---parokuvugew.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160732c786a872---ferajazo.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210714_0D88BB1F4ECC3AAB.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021072105455534.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44716603228.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/dikopakepenufo.pdfIn PDF document text
    • https://jambukuning.com/contents//files/dumovodatowife.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/basemuv.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091bb487c19c---zagakesokos.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/c470333d6e2131e742cfecbcb1baa622/59901710869.pdfIn PDF document text
    • http://kaies.net/upfiles/file/milugukatetutevikonamipi.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/zorefuxanajam.pdfIn PDF document text
    • https://dietacud.eu/upload/file/mofikepuwokedowupa.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/44383b8c71a3303018710ca46dd52ce4/63078586939.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161076fe366c3f---6690458075.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/murijesisited.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/sekazufujuvidelovot.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210714034941.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/44938734aa149a79ea1c0fa98d29639d/jujepofubogadufevud.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e681ac01f3c58b9c493589bce6956427/fimigutol.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3287ceb3d4de167972e89dfccf46276a/dopasemoxolipepowedus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14135 10964 bytes
SHA-256: ba642b45965746ef4446fad5031c7bf6014c78a44e8d3e696cad19c2107f6161
font_01_sfnt_off00015aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA9 21768 bytes
SHA-256: d68609edc511fa850809aab717e97e6780f03db0ba28486a101f7caab8677a01
font_02_sfnt_off00019352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19352 16140 bytes
SHA-256: 6185e6c3d527c851a3880b15dee0a7eabf59286ac97f7acc4924793486c56fdb
font_03_sfnt_off0001a8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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