Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e2300b5b97c9fe…

MALICIOUS

PDF

84.8 KB Created: 2021-07-20 07:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c37da59300e56bd50ef91efc68ed3631 SHA-1: 00449153a22bf0bb83599671e50b9ddc43694f5a SHA-256: 64e2300b5b97c9fedc3f29d898538e255d5fbe3762609fada1dda1cfa7563bbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV and an ML classifier as malicious. Heuristics indicate the presence of a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The document body is unreadable, but the presence of numerous external links, many hosted on potentially disposable domains or compromised sites, strongly supports a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d23e85852---gevotugut.pdf In PDF document text
    • https://ecohort.info/userfiles/files/39586186161.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b7c90042bd4b6056ad834aae06f64d40/ropoba.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/mapurar.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/talerig.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1eea56d2c5943347148060674e197dd6/3108113334.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/62931022918.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc05ad8a03---sixadipus.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e74fba958b4b4fd96593adcfd660fe81/lozuzuwupejekojegazewon.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/83239039645.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/xigulevo.pdfIn PDF document text
    • http://mosjob.ru/images/file/49659206870.pdfIn PDF document text
    • https://airshow-bg.com/file/xaziwavupil.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d432aa6e6b---10697109305.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/nanuz.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/9d9c173bff724c9788a08969d0d24af2/puwag.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/0j8bf867lhmn1lpsg8bp3tp1ge/22860176999.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/84279599858.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e4bed143f18---28276266626.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/2n234o0konnrbiet596aq3vj31/jusaxipexepigogotuk.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/62449945824.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5u0albr7fsc91ugh712aqr862o/84259737156.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/18033196675.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a713bf18d47---vefuwanenirefenitutinivi.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/52249188799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=robotic+automation+systemPDF link annotation
    • 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_off0000e9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C1 16944 bytes
SHA-256: f452bf9450fb52ef5af1a2f90d71514a88c014ee324b1abdc897db0d7f3154e2
font_01_sfnt_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8E 10644 bytes
SHA-256: 25ca0e15f9eec1d29d9533a8db0c2b37b5b37bcba1a479a6c88dbd4c2f7520cf

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