Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bb06ef9fab4432…

MALICIOUS

PDF

71.2 KB Created: 2020-11-10 10:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d0ee8a8bd4f7d3cc868bdfb692bc4c79 SHA-1: db955704e2458a5769e40ac1ad19c393f22499e2 SHA-256: 39bb06ef9fab4432e1df82d1923b2dcb8d221b9fd0acda083e575eabc4581ba8
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 0.9998

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://traffking.ru/123?keyword=computer+organization+and+design+pdf+5th+mips PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f89fdbb51326.pdfIn PDF document text
    • https://zekulosig.weebly.com/uploads/1/3/4/6/134689557/vusasikiwevem_xokifevadab_dimudazo.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/1205493.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/rewajabegigosumu.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/9f85b2726ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f9149dc2f816.pdfIn PDF document text
    • https://bisudika.weebly.com/uploads/1/3/4/3/134366448/91809.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/babopeloped_nezanux.pdfIn PDF document text
    • https://xavixikani.weebly.com/uploads/1/3/4/5/134502132/dunezaf.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/7167586a-63d0-41a7-b091-78203701e00c/mxr_custom_comp_deluxe_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bb8c04-0867-4e7a-ba96-cf7f9f728639/pegokolakizilupurifetofe.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/31832361631.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/24624580677.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/air_supply_albums_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/36454573905.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/nenoniwasugukafoj.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/ohio_ginseng_prices_per_pound.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_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 5504 bytes
SHA-256: a3c11e60aa5fca54762b01aee9fde95d27e52732d1b8122808066fe9d97b091a
font_01_sfnt_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 10532 bytes
SHA-256: 92bf34d955a71ae28ea3edf4ace41b057e55535f3810073f233301a894159b85

Open this report in the interactive analyzer, or submit your own file for analysis.