Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcdc52625360c0a…

MALICIOUS

PDF

82.7 KB Created: 2021-09-08 05:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6e476351e705c748eeb1e3a00ad75d3a SHA-1: e0fac197a19b846179043679c06fb81a28d10ce2 SHA-256: dfcdc52625360c0a01923c6023d8569c37da979ed278141bdfa650b709aa37c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=critical+success+factors+for+project+management+pdf PDF link annotation
    • https://clinicscrm.com/img/files/53245536169.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/13315728840cfa0c9a4c3f6efe602b59/53485981110.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb80ea49a5---jojokixedowogiwedumaku.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1612bc40c317fd---tixogebobofevurumabukap.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/99093538795.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/voxukevatunetenuvot.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/xirinos.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608dac4c44d46---73476616207.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869240c77c9---72872061867.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/108652c0a4f0573d10b236826cffb3e7/82676050928.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/kobupoxulixawik.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/dixidexudarovumusik.pdfIn PDF document text
    • http://old.arcnet.org.tw/ckfinder/userfiles/files/78937402784.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/mvrkr0oennvn0tm66fppc1gur1/zamoz.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/b20spit97vokpv3s1l9n1hulio/48209898346.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/4990064884.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/beb86242a0d61503aeacae9b21033d32/fevenoz.pdfIn PDF document text
    • http://tms-operation.com/upload/files/56307315136.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f63d4455e7---fuzusonamusatelivaj.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/zarir.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/e23201129335d5d177c40884dd2c73cb/toneside.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/95737998270.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609838367eac6---gikumolup.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/13379289056.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/7785b806cab86ea1678d7f355daa9ee5/40083297123.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_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 16884 bytes
SHA-256: ed5f82c5ddd0477bcca4a087d6a1d3fe745b3484d7a73b4648aa542774c4fdbc
font_01_sfnt_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 11224 bytes
SHA-256: be54d8b3f479cc84fe67729bf69fd094f3c1961b333643d13fae974f7a483897
font_02_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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