Malicious PDF — malware analysis report

Static analysis result for SHA-256 93efb64e94366d32…

MALICIOUS

PDF

72.8 KB Created: 2021-05-27 14:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8309eb333d191c8fddb3b2d18be42966 SHA-1: a7c44c1ff5b25177561e927e2092931fb97e22c1 SHA-256: 93efb64e94366d3287ddeb1f2d2b7991928a8b426fa646c7ca4735d942b9f319
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a URL with a 'utm_term' parameter suggests tracking or a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/uplcv?utm_term=hkey_local_machine+software+policies+microsoft+windows+windowsupdate+au+scheduledinstallday PDF link annotation
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/cc70883b0e38f0923976e5ca6225cf8d/65822497136.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/6c38e928c53b036fa6b19950cbe41a86/fipavuzosumujos.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/gapalesodibadalabatituzo.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/15745044730.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096461f0d075---54144714741.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/b608175f3c3f96d6b5db6ba48cbf8421/11109271854.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f04c5d784---jilududitagiwob.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3511008a---zufotupifonopuwerikixo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a0ff1efe7---datixil.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6893_20210521214834.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ebcf23dee---82416469099.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/810b97184ee3820dcb3a6383fa2b512a/natavov.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160942c755c417---mezabiterek.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160af7069a7b0d---60741085878.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/5235655d8d59018d6cbe3bb1a8a4202e/mutoko.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef5d93e06d---13153313758.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/8r6cgkmcumn8ls1te7ti8r4f47/2360708473.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5524 bytes
SHA-256: 07a1d7c4cf14963ec7414eae918227c3de7d949bfbc77c21716569ac2fbf7ba5
font_01_sfnt_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 10276 bytes
SHA-256: 112f0cb784c18c664b4c6729302cf22f154fb3c5d09d4e797f095a70817dd157
font_02_sfnt_off000106d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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