Malicious PDF — malware analysis report

Static analysis result for SHA-256 597fea31013478d0…

MALICIOUS

PDF

75.0 KB Created: 2021-03-17 02:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: def647e36039798543755efe7135d5fb SHA-1: 12f7128c6be4ea3a1f7c2cf85ddcd0bf326c23c0 SHA-256: 597fea31013478d01b99fada1ee213e0e6d5c70caa9cfc012ef7f157486eb678
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=the+secret+life+of+walter+mitty+quotes+wallpaper PDF link annotation
    • http://fuxezaboxekave.scienceontheweb.net/albeniz_cordoba_guitar.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/32920148688.pdfIn PDF document text
    • http://soxiwokix.iblogger.org/69976623492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_60439cd91970f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_6030868167ebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_600b7a9509305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_6009d88e8a069.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
    • https://s3.amazonaws.com/vipuxafol/75273708986.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/pegejikisukezaxavikizus.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/85159756657.pdfIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_04549ef6f51248e2bb587c6c3371fe37.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_862a56e4afec43b39c78e3911399c1b5.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_45a33a5a9ea3473c9a0d2735818b4816.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widuxade/baofeng_uv-_5r_menu_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/66742123422.pdfIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_461ea280b69c45b5a70075d02d053553.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/85898428808.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/aditya_birla_mutual_fund_nominee_form.pdfIn PDF document text
    • http://xelidamos.epizy.com/injustice_2_ios_beginners_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/sarugelejakabigukupaxopiz.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_off0000d82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82D 5300 bytes
SHA-256: f9b9fe86e4c43d34fe9f2879ba32d4aab48881321838cdca33d007fdc4464fa7
font_01_sfnt_off0000ea55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 11212 bytes
SHA-256: 5fbf9a6579288764312797384bbf78c29c794d1e2de048b59e18f4c90669acce
font_02_sfnt_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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