Malicious PDF — malware analysis report

Static analysis result for SHA-256 c942cfee29b2a8f9…

MALICIOUS

PDF

83.2 KB Created: 2021-04-04 20:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ed0726b21d8787edc686d5e1c2eee9b5 SHA-1: 595aa64f8bfaa45195505ab1975fc6fe6a63014a SHA-256: c942cfee29b2a8f900f870b16b127d6e9753c8b65e523a5ca603458b61e82411
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 0.9995

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://lozipotod.ru/award?keyword=things+i+wish+i+d+known+before+we+got+married+pdf PDF link annotation
    • http://microdigitalmeter.xyz/how_to_become_a_vet_tech_in_floridauenph.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/VDBKidx/starlink_free_internet.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/gjciiLV/25163058800.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/functional_properties_of_food_components_pomeranz.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/U56gihf/random_cash_app_sign_in_code.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/gobiba.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/historia_del_neoliberalismo_en_mexico.pdfIn PDF document text
    • http://baby-slings.ru/33915681054h240.pdfIn PDF document text
    • http://mists.space/mi_guia_de_aceites_esenciales_young_livingmtbgg.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/gfcE15k/mini_glider_surfboard.pdfIn PDF document text
    • http://titanovyi-filtr.ru/xinariruzifukun443sl.pdfIn PDF document text
    • http://lamovingcompany.com/73397641736l9ppb.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.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
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_39bc10a987e442d18e8fba3a75893899.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_7c6b03dc2fe549f18f4042416e502253.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_b9d51e3de87a4f7f9ad5d251d6f64a1d.pdf?index=trueIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_a249488a2db54936bc81d067f0633dec.pdf?index=trueIn PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_6d10510dfe7a43dda4034ba4fea385af.pdf?index=trueIn PDF document text
    • http://ravojetejevigim.epizy.com/75639434036.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/14775970670.pdfIn PDF document text
    • http://tijopuzotozume.rf.gd/kuroxezemeware.pdfIn PDF document text
    • http://dinexun.epizy.com/puvekojuninewawabixebe.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_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 5456 bytes
SHA-256: e2f9fa3b8f62aa80a4e1baba0da55cea732af5872dd1de8b33d7d04ef469061c
font_01_sfnt_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 15508 bytes
SHA-256: 6190a4d403e54c6b1c966cac46442a3aaabf2f2a80f0f317dab45ade5663feac
font_02_sfnt_off00012eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EED 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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