Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad65de49f0698a05…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 23:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: decb18af2fe025ba72a142b5ed5cdd0d SHA-1: 946e706374de5d0c062a0e99799d1de90f405111 SHA-256: ad65de49f0698a0598cd889a50399934c0cf9cce1d4f1246b70f9b3000f8621c
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://nipisod.ru/award?keyword=amaury+guichon+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5fe6cb9b9f012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380380/normal_5fc99b672b76b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449009/normal_6000f12cb5dc0.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/betolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484815/normal_60370198ee733.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/all_mobile_company_name_list_in_world.pdfIn PDF document text
    • https://rofexelugikovu.weebly.com/uploads/1/3/4/7/134732340/d17ea.pdfIn PDF document text
    • https://poduxerot.weebly.com/uploads/1/3/0/7/130776630/vujabuzitusira-xexutuwuse-jofijixuzuwovej-burujobojog.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/kindergarten_maths_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5fd1b38bb084b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dezajok/nuvinunuganilu.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/borland_turbo_c_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/63956287202.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/headlight_bulb_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/what_does_the_word_sin_mean_in_greek.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/pozisemigasifiletosuzifib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c493bb07-57ef-42a0-9402-8d3ae33d09bf/86318232825.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/the_beginning_of_everything_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78699441-9fec-4da0-838e-1efd7807190f/audacity_free_download_for_ipad.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_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 5656 bytes
SHA-256: 3f9ff60787a83c6be5f2c1e11386ceb8c933af802b989255bef0102d342fa525
font_01_sfnt_off0000ec89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC89 11816 bytes
SHA-256: 29773d6e3ac75dcaab562e6ed9648d876c4f1bf3686273a503f8c0cc003e45f3
font_02_sfnt_off0001148d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148D 16888 bytes
SHA-256: 1d3a2f08164db0385ade31cd996210b68fd2f74a939553ec523aa7a86df810fb

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