Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f6c4e86ed88096…

MALICIOUS

PDF

73.3 KB Created: 2021-07-05 08:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 95d343864fc28a1bf8b627049c8fb42c SHA-1: 87a1fa94a28295b9de4b718bf7bd48ec54274b3c SHA-256: e1f6c4e86ed880965dcadccca482982ad006484e7eb3250749ff3dc2adc38775
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it's part of a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting further supports this assessment.

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 https://crewmak.ru/uplcv?utm_term=rudolph+jack+in+the+box PDF link annotation
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160de1cf279988---jijobofota.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb581d082---gexatebiwagelafad.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/3q9ip3rt0m78nnfmeftoc9sqk6/widabenasarudi.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/38809008704.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e32c7cae5ff91469c16d2270ed0bca18/55554843714.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/20cd50ca123cc4e9ccd6b97fc3938cf3/batanilununura.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/48960251289.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/52908516703.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/tifudofipiwomoxarewiz.pdfIn PDF document text
    • http://familiesforfamilies.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/79878976986.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/8cf0fa3b74f3241f81e3bd53654be9d7/38635807791.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/pamazebugogavarogodo.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b1db4d6860b---74832882678.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a856190fe01---vulanekikukugifakebibef.pdfIn PDF document text
    • http://attlas.center/userfiles/file/53245558960.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160835e9e11841---namekadegewogadif.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a77642e47---87537228294.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/xawawolixevekog.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608a92799e67b---8705803435.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jofepifavovozadifalewevuf.pdfIn PDF document text
    • https://invest.pl/userfiles/file/xojoxobu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7882f0aff3bf8ee2ed27c0ecc844c813/mapiwobosafosezamu.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/17352795253.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/44649395421.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_off0000baf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF8 17060 bytes
SHA-256: ec06e954016f5a7ecf1ad1e6efb0fb7881f459a2d9bd240696fc5916a7179d89
font_01_sfnt_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 10952 bytes
SHA-256: d6b520fb409d3984a662f7f203fc3b4b616cfe6ce853f8f2d1145ed3a833b2d2

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