Malicious PDF — malware analysis report

Static analysis result for SHA-256 577fc60c789b0823…

MALICIOUS

PDF

212.2 KB Created: 2021-07-14 07:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c6b54914e1efefcacdee8e4ab390e4ab SHA-1: e5b0c3ccb054c4897cbe8fc4283ee69efcc4de89 SHA-256: 577fc60c789b08234c3d9fe75a8d53c027ebdec3e6d1a4b61dc835f7c9fe5e2f
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of external URIs and a 'download button' lure suggests a phishing attempt designed to trick users into downloading a malicious payload. The document body was unreadable, but the overall pattern points to a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=parts+and+functions+of+compound+microscope+pdf PDF link annotation
    • http://cpils.com/userfiles/file/beruke.pdfIn PDF document text
    • http://thehonourride.com/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/mabuvijunupatejatuvepa.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609deab52743a---xaribujelumipagisu.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a000c01841e---newojimalibogije.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5903f8ecd1---66444022133.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/4092257155.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd430d4cf93---94417587924.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1622567943.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/fe7ea70ef9375565e4f90a3584641dd8/84328558575.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16084e350de581---piwugubijenadilazalenap.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/d1c3104bc949129cc3feee47f170bc4c/tabuj.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/8e965beb14faaaf7441b36b46c61311c/jakazemelabefete.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/1qatfrkhv6llphprgtm2579ht3/83138961868.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/wusuzimimirud.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a0302af152e---jaruvaxagabixirivelefak.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160924a1aad568---zixuwojumifaxubabobuku.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/50d638d6ce3499bf70ab68f9698dfa31/fakonezax.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/67bd34d36062be72235f2dcf0343e994/luxasivukub.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/21972423195.pdfIn PDF document text
    • https://samowar.ch/upload/file/48139893618.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/85699861803.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079940d3f2d0---womudizasivegojozu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E04A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F85C 18464 bytes
SHA-256: 225f9ff7b545e0b91966f4c236a3f016275ef458e8da9c92201dba7ffe76279a
font_02_sfnt_off0003295c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3295C 10836 bytes
SHA-256: 60fed06a967982996992c9610abe3dc047b8bc5f7ab2ef77703c818eb3b45d80

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