Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec45b99eea567d1…

MALICIOUS

PDF

101.1 KB Created: 2021-07-02 05:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 20f5899ba64c8894a738cc011d3521c7 SHA-1: 3d5d69daae734fba9471276ac8a6f76278870aba SHA-256: fec45b99eea567d1cbb6f14e8781eda405b56d636443a0ec960cf5f6cb49f33e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://irlanc.ru/uplcv?utm_term=maleficent+2014+streaming PDF link annotation
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/65b12245fa2e7202f793e2068c860491/32401660626.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fedaa25ca6---78818687672.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/lojukapevu.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ilkp03eeht7i4qol87slh08hi0/58768267959.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/a185d8aa6b06e4733cf88bf2d52db8c3/fokofijipega.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/5d6fe8a7456e30064307fcf2c522cbab/6999710711.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/31210765175.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d507132c6d9f6e8bd9dc014b24a39dcb/fogix.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/j5a1d9i4pospfuu7ekopsj3djd/risuxuxajuditijafazu.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/lator.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/18247147392.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/b9b0c8ea803839eadca9292c399922ff/rubezojesa.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b585a8dcf---89875342867.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a167b015646---61036532552.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/dotodunazo.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/gisawosewunivetobi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/63bsr9amu9i0fa6i6cgbl15pe2/dowavovupofuzozakavuxadob.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091319c0bff1---tavarujojafonev.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebdc603f4e---mukowisenimuzizakunida.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/pepixadixorimowiviv.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/35245303871.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/zoresawutusosatukijajub.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/6kjv6leqlg96u05a4j676d60v9/38817597691.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/1vcevmc5o86mtjha2o73oldg3r/xojexofig.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 18408 bytes
SHA-256: 2055f21a32e21f14890aa6f4e1774654d6d07216251bf888ac13d23eb5f6062e
font_01_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
font_02_sfnt_off00014a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001629f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629F 10924 bytes
SHA-256: f1d43df267c5f323f7dffc3d74a82b9a2f38b335b98169bc12164bb9dae0a2cf
font_04_sfnt_off00017c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C0F 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb

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