Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7a815e93d1cd75…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 14:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e66f899b75ace803c1cd349c26e3c630 SHA-1: c2e25221688c8967c214026c00c8e0267fb2b55f SHA-256: 6c7a815e93d1cd75bbcd2fc333e7bceee7b37ce55e4878834960922868881c56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious content designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610eef18bc192---38180639178.pdf In PDF document text
    • https://betenenergy.com/sites/default/files/file/75919922845.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/tomemosobefonekapeb.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c521a892c49---wuvedavalagi.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/bisowodiraxiwusanu.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/567802ca2c50fe1e461bec28c287c787/sifiwadaxurinelizoriwisa.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d9489288a2b---sunejenanorujuxutimizuv.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/xaberilidegududawowevag.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/d2aab628a7e553098093ab3d9b79093b/jivewapexavigomipu.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/nekeraxasesaxub.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/12338802768.pdfIn PDF document text
    • http://technocom.pl/editor/file/73635156129.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/9d5626555629c728cc96b325f1bcba34/suxefafajutevobixusivuze.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/a54276d3d21676904a6c9d0358390375/pifamunomafojifox.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/42197271010.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/73559218657.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/911086203.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/mozumozenexonululax.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/wazujobebodogorutebiboren.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/32940063779.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/jmmqth2876u46qo59d68mjm096/52954729303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=properties+of+matter+test+5th+grade+pdfPDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/nugasawos.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_off0000cd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3A 17444 bytes
SHA-256: 0b962f2b3340141b6d9c8e062262a21fd771fec4e4a524e7ac22dd10e0c19eae
font_01_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11202 10928 bytes
SHA-256: 6067c894dd0166fe6affc5e81dab7f1fbf07c5fecffb47db16c7a51ddd69b872

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