Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d93fd4bcb3c93b2…

MALICIOUS

PDF

84.4 KB Created: 2021-03-10 23:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 01a2f5bef7e4733dd14f516fac0fda3b SHA-1: 005868ba269e1b38b301071fe77593bb92803be9 SHA-256: 3d93fd4bcb3c93b23c03d388b9518e8c245eaacbaa635140d0991aae3911bc1d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing (DHL) and ML classification. It contains numerous external URIs, with one pointing to a suspicious domain 'midufefew.ru' and another to a redirector hosted on 'weebly.com' which is associated with the phishing lure. The presence of embedded URLs and the overall structure suggest it's designed to lead the user to a credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/3da4dbd45e7.pdf.
  • 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://midufefew.ru/award?keyword=acca+f5+revision+kit+pdf+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fda817a54e9b.pdfIn PDF document text
    • http://podjem2.club/56614223583gjzc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_60172bf22cf64.pdfIn PDF document text
    • https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/3da4dbd45e7.pdfIn PDF document text
    • http://getbuiss.online/8942402349amv0i.pdfIn PDF document text
    • http://afracheat2.xyz/what_is_the_permit_number_on_a_drivers_permit_illinois0g3yx.pdfIn PDF document text
    • https://zifekibovaliw.weebly.com/uploads/1/3/1/8/131871714/2961674.pdfIn PDF document text
    • http://websporizlehd.com/free_lagu_karaoke_mp4qmdf9.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/2132798.pdfIn PDF document text
    • http://fimewot.xyz/behavioral_neuroscience_textbooknhohs.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/09b60ba4-dfb9-473d-8604-99786a9e2299/vocabulary_workshop_level_d_unit_3_answers_quizlet.pdfIn PDF document text
    • http://fonenutekosut.epizy.com/68144319780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f57c4-b3e8-4aae-978f-d7e7942e3b87/a_suitable_boy_trailer_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/turn_off_accessibility_windows_10_keyboard_shortcuts.pdfIn PDF document text
    • http://getakufo.epizy.com/xutejotejefijogoloj.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/79637264843.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/taxukora.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/godawugopatolarujijetidob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f32bfb-b603-4fe3-91ae-c85a6eef2683/74379788176.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_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 5628 bytes
SHA-256: c86e76392b4a7e54c07902ee4672edf7b999643208ee8074b2f4927149c71da4
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 2472 bytes
SHA-256: 42ff0b8eb214547d2a2019e4e4b16d8663dee85a5f6407e6190fadcbd96c2053
font_02_sfnt_off0001033c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033C 13344 bytes
SHA-256: 9ab61a1c4b2fa2c68e94465d6973226770c29c392716b7b449ef5c07439f999b
font_03_sfnt_off00012e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E13 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1