Malicious PDF — malware analysis report

Static analysis result for SHA-256 207406061ab197bc…

MALICIOUS

PDF

75.8 KB Created: 2021-04-06 04:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0db96cdcd54f5349ca8e948ec7e19b8b SHA-1: ed59baddca438788cd277ca3a8a152ab2228fade SHA-256: 207406061ab197bca038c7894c2cd6c5765ca5f973a390f40bfb0d0a26da9c94
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=how+long+do+you+cook+a+waffle+in+a+waffle+maker PDF link annotation
    • https://cdn.sqhk.co/depadukat/TQgdjd9/popularity_of_programming_languages_pypl_index.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://chebsvet.ru/ssr_125cc_pit_bike_top_speedtmzan.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/qihgfgi/72195935432.pdfIn PDF document text
    • https://cdn.sqhk.co/fexivijemozu/iahflhe/32733215914.pdfIn PDF document text
    • http://hytri.com/mevovesenakapebatuzupapatfqy7z.pdfIn PDF document text
    • https://cdn.sqhk.co/lazimafuxuxi/UAhbggx/70900412767.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_6d9635cb73544a868bad4f88f0af66c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/219bdcd1-d40a-4478-b11d-ff9404cccd78/el_ser_uno_libros_comprar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2812c406-d9cb-45f0-bc6e-fc9ed40cd0cf/margin_of_safety_formula_toxicology.pdfIn PDF document text
    • https://30372bae-fb3d-4285-bee0-d91e70c22047.filesusr.com/ugd/835091_fe863219b8c54b9c9a06bb4e51e769cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitozi/87403460722.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/whatsapp_messenger_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/66453989540.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_a118472c99c74f0080d3edc094c97e43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/27993981896.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/26990682553.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/proof_of_work_experience_sample_letter.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_b69feebf2434412b8e3be77e95e9de22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/karmasangsthan_bengali_newspaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e35044-7bdc-4f44-adcb-ad639649884f/62752044738.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 5380 bytes
SHA-256: 2506939c7a6a8106f926625ed473d91ae22add1529c998512cb22f070bac4704
font_01_sfnt_off0000fcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 10764 bytes
SHA-256: 65f4414917c2b155d86e7ccc2355169ef98b26bc9de3eb0af5d9e46dd483a655

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