Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cacdb88b24bd34b…

MALICIOUS

PDF

77.3 KB Created: 2021-03-22 20:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11972fb8a0872f382e2152f3c8b0b445 SHA-1: b23ec8f49f76915f880cfeb1caa54788087c6ef5 SHA-256: 0cacdb88b24bd34b9d8ef600b06814f76206e60e70f975c8e4bdaa1ab7cebb80
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://golowaki.ru/strik?utm_term=how+to+do+gift+box+with+paper PDF link annotation
    • http://witaxolexigabi.mywebcommunity.org/statistical_methods_for_psychology_8th.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/jhJjeQE/fruit_cutter_knife_master.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/4qjiUjj/acnh_life-_animal_crossing_new_horizons_guides.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/literary_terms_crossword_puzzle_1-20.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/flysky_fs-gt3c_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/tojegaxamox/fKNjeT8/al_quran_online_free.pdfIn PDF document text
    • http://patolul.iblogger.org/project_management_certification_online_stanford.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/49370619955.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/ludobaliwanoxapixekituto.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/hjKicii/advisory_committee_on_immunization_practices_guidelines.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/saneduzulijibovovidor.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/n2hdjcC/mine_survival_pc.pdfIn PDF document text
    • http://zomesotemaxage.66ghz.com/6th_class_english_textbook.pdfIn PDF document text
    • http://fotobaruti.22web.org/16747813433.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/32516027346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rupilozomu.epizy.com/how_to_open_multi_code_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/bearing_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/weather_report_in_balbehra.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/seluxetumowotulusakamola.pdfIn PDF document text
    • http://javebetuxupekas.epizy.com/kewosuxal.pdfIn PDF document text
    • http://rupegofiminatef.epizy.com/bonufozobokewowazenuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/watts_premier_ro_system_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/tamodiziwuwabar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 5036 bytes
SHA-256: 90ca57b07b9a3049a90d6f83d659b7989ad3beb51edfa7be452d835b04de9e14
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 10876 bytes
SHA-256: 722cf85091e4b568d629f9585cd1976bc39f501940155472333aa795b5a6c2a4
font_02_sfnt_off000119ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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