Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f74faf6030ec39…

MALICIOUS

PDF

99.9 KB Created: 2021-03-10 22:30:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c56e958f4fe6c0cd5de6754ac20eb39e SHA-1: 10571fee8482fc12d77f882cc70cd8a644d5ab78 SHA-256: d5f74faf6030ec3948de2966b9295b259cffe2661801da3fd2c5849de6fd13b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/123?utm_term=nemesis+service+suite%2528+nss+free PDF link annotation
    • https://cdn.sqhk.co/womawuxinuge/ijig7hi/best_video_calling_device_for_tv.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/dexalitubejamed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476564/normal_5ff1c183c20c7.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/84005027142.pdfIn PDF document text
    • http://raifaisentgo.online/when_was_the_1st_harry_potter_movie_releasedzgmzm.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/netgear_wgr614_v7_firmware.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496001/normal_5fdef80b74207.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/jiicgjj/rise_of_kingdoms_commander_guide_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/gcnlgfZ/dollify_girl_with_blonde_hair.pdfIn PDF document text
    • http://cuzinfo.ru/glucose_ring_structure_formation1bgmr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_60125016f1c64.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/fggjc2E/xotemaxupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443588/normal_6036c0096151d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekowezitodog.rf.gd/puvutadudojiwerebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00cdc017-8625-43e2-9167-5e13f5cb4fa1/farojugutogagofumipidibup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/970af564-8b9d-4a98-a163-65f2a695e7f6/owen_meany_chapter_summary.pdfIn PDF document text
    • http://nuzetewadan.epizy.com/twin_platform_bed_with_storage_and_headboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d445b911-b6a6-4af1-9e55-6f381c6ff548/84133127306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e51821-efdc-4763-acab-7e171af531dc/zimov.pdfIn PDF document text
    • http://lixutepojux.rf.gd/auditors_report_format.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 22008 bytes
SHA-256: 19d7550115c14e349081f0ddd82e31816addc6338bf68f7c056dfb6a396314e9
font_01_sfnt_off000136fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FA 4892 bytes
SHA-256: b76f04562f18be04b5f7a328762afc858649bc3e692bf26bb4bd41da6a684974
font_02_sfnt_off000147a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A2 10576 bytes
SHA-256: 06f90157d9e4a19c36146ad4a81310103d355f00a0f71b12cfb2c4ae23c1fbcc
font_03_sfnt_off00016c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C1A 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501