Malicious PDF — malware analysis report

Static analysis result for SHA-256 486599f47d7b202f…

MALICIOUS

PDF

67.4 KB Created: 2020-12-21 13:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f03ab8fdeba19c0940323bffb3bbe167 SHA-1: 933b36654bf2f64c03985d64f561be885a14a8d5 SHA-256: 486599f47d7b202fb0f178853cab076c98e1dfd100fea02ffc9828923ca81a03
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'trafftec.ru' which is flagged as suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=chungha+offline+kpop+download PDF link annotation
    • https://kebakiwaranug.weebly.com/uploads/1/3/4/3/134317860/joloduduvevoxaxojoda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/667ba639-ea99-4896-8757-7f5f2e1e5d08/dekun.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/tefebifulujegawiva.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/oracion_a_la_sangre_de_cristo_por_el_hogar.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/motor_vehicle_tax_receipt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d748aa-f074-49bb-a56e-958c2021d539/basic_english_grammar_book_azar.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/icloud_indir_android.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/57187074782.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/palms_movie_theater_las_vegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfa54be-77ee-4cf2-8ef8-3762d90acceb/deus_ex_machina_mankind_divided_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c164595-2adf-4641-8bd3-763edc6d7ca9/vw_gti_accessories_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ce74b1-5c50-41b8-b352-aa2bc36a2ed8/yellowstone_guide_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c3773e2-afc6-4fa5-b783-23a834e8661c/75075321643.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA5 4016 bytes
SHA-256: 81f7588cfc7bc988c0195be536bb780bb53de3f1f35ccb83e33bb1beb44ca40e
font_01_sfnt_off0000ca1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1E 5092 bytes
SHA-256: 86d645f47030c989b8521287fd1de63dd2865d6cc309eb9a6040ccd8c8f5b045
font_02_sfnt_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 10508 bytes
SHA-256: 7dcccd549f67b5c2efd5eb13b97fb818a6ed9107ed14309878abe4b667210779

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