Malicious PDF — malware analysis report

Static analysis result for SHA-256 40da2de848f887ff…

MALICIOUS

PDF

78.8 KB Created: 2021-06-02 01:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6580caab2107ccdca387e82219186696 SHA-1: a74a7363a8bed76350e61820d78f11707169589f SHA-256: 40da2de848f887ff37afca96564e9f28135851970d678ab5255079b1b5f3c097
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-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://pelibifir.ru/123?utm_term=listening+practice+tests+with+answers+and+audio PDF link annotation
    • https://xusuzipurojovup.weebly.com/uploads/1/3/4/3/134325257/eafddf243a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_601dbcbff180a.pdfIn PDF document text
    • https://dudosixe.weebly.com/uploads/1/3/4/3/134323580/feroniparezew-wupuruvamisuv-mawonovoxi-jepikusaveban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_60527a37b7e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_601b857e2e4e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5fde5ca99d398.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/9a90a05a-9bbf-40b4-b3f9-7689cb2afb49/fajawufabukaseju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2313a5-c1a6-453e-a2d6-dbaf60fc4579/24565065062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6860f5e-1d5d-4b1e-8f4d-6d94af7dae7d/gta_for_mobile_apk_and_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10049e6-e3c6-49f4-b4f2-e5e0ff86861b/rerobowokalajaraxof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1389fc-aec0-487c-b935-63a5622edb1c/the_hobbit_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4f27f3-1655-429e-8da1-8105ec1d9108/95991423179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2e9572-318b-49ea-9334-2d558aa281c3/zagolodewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678f5086-d103-482c-bbe3-437b538dceac/filowisarupeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e28752f-3fc6-4ddc-b03e-72ef8c02f867/adobe_premiere_rush_freezing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e8e5bb-907b-4439-901b-e53ef53b1be5/vogue_media_kit_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b145ab9d-e0e4-4289-a615-658bd8571ac5/solution_organic_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8a0527-a877-48af-8a8f-03d899d89524/gerunds_participles_and_infinitives_worksheets_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 5336 bytes
SHA-256: 1257861f812a7225b728e30621cdf4b5189c306059db3fc916e59cb83c3af091
font_01_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 11104 bytes
SHA-256: a7569def1f8a0b781142ff123f1b18140794d9e458a4ca806482c428504dace5
font_02_sfnt_off000118fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FB 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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