Malicious PDF — malware analysis report

Static analysis result for SHA-256 65550f1bd0dcea16…

MALICIOUS

PDF

122.9 KB Created: 2021-06-15 12:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aadb85229f7bdf77575bf4b83249c9e2 SHA-1: 4da25ca530df08918d440c2acc1148d81934ff13 SHA-256: 65550f1bd0dcea169444c9888c5736e7b9b5979f71a4d933a8aa2b2a745abb61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the document's structure and URL patterns are consistent with a lure to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8615

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
  • 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
  • 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://nomylo.ru/uplcv?utm_term=one+punch+man+season+2+episode+7+english+dub PDF link annotation
    • https://cakenepal.com/userfiles/file/14964512953.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/80954955126.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/50912038814.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/74522644796.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ff7d20640---gewadavo.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/tf4p9ohvaj9lev5l3b55ljiq1j/66558832856.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8ff6929b5c50d69b7932cdb2f2407bcb/taxoropisa.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/nurufuxavifa.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/mezituxaronexejosigumi.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/patisokol.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/15e1d9d56ced5f38228a3b0c2d9e4a82/mozudimixomutonej.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/gixemudunaxujut.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4380176338---mojuwareratafosawo.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/38d94328c3cc97baaf8dad62b99a5f20/sijure.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/mutirezemubinupagi.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/16466f1b2e9999d167f6381de0b28da9/gapoxovowevuzoxos.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f960f862ffadf74a611497c8ff1017d1/2316648496.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/9b70e5dd433b09ae193747a89bba9d3e/guvejezivikexegegetatuli.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/o9li0cct7hal6p6b40s1uuvvq3/pivegerupebika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00012a43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12A43 48620 bytes
SHA-256: 69d8a3295920c4b17bb870e435d49508baad809e2981f080148bfc775c05cf04
font_01_sfnt_off0001bf70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF70 5772 bytes
SHA-256: a6e16c8d7b5058386126dc060f7ad3d0fc643784107dbf6961c988870d2188cb
font_02_sfnt_off0001d2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2DF 2656 bytes
SHA-256: e2b8b9cbb18227f6591d1ae9b104cfdae9b75758cb2dac1c6cd84426fb52ed75

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