Malicious PDF — malware analysis report

Static analysis result for SHA-256 9068455aa19e35f9…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 07:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d231ac6d43eb40325f9fb21602644a83 SHA-1: 23da477d29177a04bfba684a527e01c1ff3a2a33 SHA-256: 9068455aa19e35f9314c799b495040507e56935448eaa99eb6ad544a0cb0df42
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 0.9993

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://jottigo.ru/123?utm_term=makoto+gift+guide+persona+5 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fde1823c5b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426261/normal_5fe6660eee293.pdfIn PDF document text
    • http://juzagunugix.iblogger.org/5867193623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_6045f3d251da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_602790e8639e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_6042d5d356715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_603ce5bac4082.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/5c55e61c-5799-40d2-b3b9-7269b81f3b40/3061212599.pdfIn PDF document text
    • http://fuginifetulad.epizy.com/free_bargello_quilt_patterns.pdfIn PDF document text
    • http://dalotidel.epizy.com/what_is_the_best_microsoft_program_to_create_a_flowchart.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_aa5dd74f2e06488b8e4a090825688a40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2c6471-0003-4a9b-badc-73957c25415e/comic_strips_for_3rd_grade.pdfIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_4b879460724e4079a569108aef6cc395.pdf?index=trueIn PDF document text
    • http://vumafovixono.rf.gd/engineering_lab_report_cover_page.pdfIn PDF document text
    • http://nivajunupoz.epizy.com/what_do_all_living_things_have_in_common_5_things.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a41774d-0ca2-4977-8b08-445066ec0ae3/smart_ups_1500_battery_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c1f8fe-bc5a-4930-a666-164ecf822f05/70623198514.pdfIn PDF document text
    • http://wisunabowogus.epizy.com/caso_clinico_anemia_sideroblastica.pdfIn PDF document text
    • http://josekopiguvalup.epizy.com/gps_62s_manual.pdfIn PDF document text
    • http://liforese.epizy.com/zafodujoxudadiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a60df4-72cf-4870-8380-7b7bb5e87b00/power_pressure_cooker_xl_recipes_beef_stroganoff.pdfIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_507369cd4c5d4df1a0e519ca9cb03c75.pdf?index=trueIn PDF document text
    • http://gerosopidazab.rf.gd/curso_de_violo_para_iniciantes.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_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 5368 bytes
SHA-256: 7702ffa2ad1c1a791c557f0a81bb049ce29b9d9b7f0d014d61f3fc70ef34eb7d
font_01_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 11196 bytes
SHA-256: c400b0b7c904cdeb722d85ac353ac25d9a1b4fc4844b55dfcc42b1223479132f