Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e077ef57fdf273a…

MALICIOUS

PDF

81.3 KB Created: 2021-03-21 11:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ada8947add245b6284a9b5be8bfa2860 SHA-1: 55a79140b7af8c940a102c6acc3d3858de3c08c8 SHA-256: 8e077ef57fdf273a45ee9c1e8ab87b899a05ee1c0844565ac2c2d6885dcbf545
186 Risk Score

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. It uses brand-impersonation credential phishing. 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 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bososotozakep.weebly.com/uploads/1/3/1/4/131437593/2084478.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://pelibifir.ru/wix?keyword=pervert+guide+to+ideology+stream+online PDF link annotation
    • https://cdn.sqhk.co/ruwonumatag/cidnhtL/rikawolikofulipusix.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/Uhfgfge/89171860201.pdfIn PDF document text
    • http://tvoyoproc.fun/new_look_white_rose_telephone_numberzwmle.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/gjhjaih/zilim.pdfIn PDF document text
    • http://ranking-se.com/siburojawurozujawnylgs.pdfIn PDF document text
    • https://bososotozakep.weebly.com/uploads/1/3/1/4/131437593/2084478.pdfIn PDF document text
    • http://yandex-delivery.cc/61264402533btqhy.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/teachers_guide_science_8_quarter_3gzqwu.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/d6605ff7e53.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/56241435075.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/jaKV4be/final_goal_of_christianity.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/2179875.pdfIn PDF document text
    • http://birjand.design/indonesia_vpn_for_android_apk8i2q5.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/741d603dc0cd3.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/davaxipukezoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufelinal.rf.gd/xagivanibat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e123b3-b541-4c18-9f42-7a13c0aeea21/famous_daves_ribs_nutrition_facts.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/collecting_like_terms_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2bc829-30b4-4459-8ea9-4429d29d1b28/42375366801.pdfIn PDF document text
    • http://zuvaxazalafes.epizy.com/66731165700.pdfIn PDF document text
    • http://dizujupena.rf.gd/birmingham_city_council_planning_committee_reports.pdfIn PDF document text
    • http://vixalomoka.epizy.com/peskin_and_schroeder_table_of_contents.pdfIn PDF document text
    • http://mizuselafu.rf.gd/is_there_a_no_carb_coffee_creamer.pdfIn PDF document text
    • http://nimokum.rf.gd/tomutitobigufipel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b67df9a-c515-457e-a548-c6981e35a4c6/33270421417.pdfIn PDF document text
    • http://jelugubafegoj.rf.gd/69414044857.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_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 5308 bytes
SHA-256: 189b722348e8bab1954d1ac569521b823f8ff739704e5ee3798b32e315ae2b7f
font_01_sfnt_off00011236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11236 10964 bytes
SHA-256: 4da73e0f2db01fda04078f2a0f92c910103c39a35e5c9c844869a6fd648cadce