Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e94d952a7e6e4e…

MALICIOUS

PDF

76.1 KB Created: 2021-04-23 19:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c68798ad5f93134632fd586cf53eca77 SHA-1: 2e61a1f3f86cc469de324796528da1afe7b1d2ea SHA-256: 22e94d952a7e6e4e69c4c5166d50cfed5c5a973e96acdf9e33621bcef7d96bd3
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 0.9991

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://ponafet.ru/strik?utm_term=how+to+answer+oral+questions+in+an+interview PDF link annotation
    • http://gisoboxizaza.mygamesonline.org/will_star_citizen_be_on_xbox_one.pdfIn PDF document text
    • http://nuraramibifowom.22web.org/welowegojolivodatazeni.pdfIn PDF document text
    • http://ladariduzaw.22web.org/8826797375.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/25115853048.pdfIn PDF document text
    • http://zinalonisu.iblogger.org/barron_s_sat_subject_test_math_level_2_12th_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katetagozu.epizy.com/storytelling_worksheet.pdfIn PDF document text
    • http://nadiripu.epizy.com/30600336589.pdfIn PDF document text
    • http://desuvusemexemob.epizy.com/gusset_design_in_sheet_metal.pdfIn PDF document text
    • http://furarojakak.epizy.com/bank_of_baroda_exam_syllabus_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/25376548655.pdfIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_dfc09010b7ba47a19ea99765e5c44a51.pdf?index=trueIn PDF document text
    • http://godosuluto.myartsonline.com/cessna_310_maintenance_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff18c0f-086d-4e2b-8115-5ffbb3df383e/brother_p-touch_model_pt-70_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/adobe_photoshop_express_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/beijing_capital_international_airport_departure_information.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_7ca52c4635c848d3ba3b18ba808f6ce7.pdf?index=trueIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_74f32b3200db4155ae495a6ed4ed16a7.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_0f110a774c4a4266b976a87a872f7bf1.pdf?index=trueIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_6d426e86bfe242b9b17c089ec1817601.pdf?index=trueIn PDF document text
    • http://kewoxorewozox.rf.gd/get_sheet_by_name_google_script.pdfIn PDF document text
    • http://zijodere.rf.gd/alouette_easy_piano.pdfIn PDF document text
    • http://vabetatamuf.rf.gd/62054389055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49391a7-9563-4beb-b5b5-da01a455f1c0/gijewerojedu.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/5099147999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb55b832-5a11-49f0-acd1-e3e7c06af373/5_tips_for_selling_your_home_in_winter.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_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 4916 bytes
SHA-256: ca6c7448cef3a6828bf6eb7360a41f3e27fac6f6f40a1db1d7b8fa148c572feb
font_01_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 10588 bytes
SHA-256: bd4cd845aa1637fa2b56e6fcf07ee39874d8f8fc7416775a5e4ba7f269ae2bc3