Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad17719b24df098…

MALICIOUS

PDF

80.1 KB Created: 2021-03-31 20:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1e15030c9025f486e9e366e780cd363a SHA-1: 0bfd542c93e8adc46c9448bfd17c9e26732a7ad9 SHA-256: fad17719b24df098e2e760de9bafac652b00d4f0b44da3b41b87ac8e99773a47
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many of which point to disposable domains and are likely part of a link farm. The document's content and the presence of numerous external URIs suggest a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=ufc+houston+tickets+2020 PDF link annotation
    • https://cdn.sqhk.co/tejilunuf/8vtha44/tiny_farmer_family_building_tycoon_farming_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/kepozote/3Akicig/xorewururukofikobovusatet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_600834ad74af7.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/j7sjdLc/dewagifuwarajufoguvovezu.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/hegGBxN/classic_piano_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_60257ba4da912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5ffaa2b3d87ce.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/FU6nhdX/online_soccer_betting_sites_in_zimbabwe.pdfIn PDF document text
    • http://perorivatifurar.iblogger.org/zewugenovip.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/xuhfja4/ps4_emulator_zip_file_download_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_600fa1d996997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_601814718b8b0.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/aiagegf/13853290343.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/zifgfOM/screen_guide_parental_control.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/ibFichb/58911243064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_7bd3183c2db7415ca6f8eb9b07ff7231.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_d8294f32c92941918067516669d8fac0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/gazafel.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_15e83d07d12c4a0ba819cd4eaf2dea5c.pdf?index=trueIn PDF document text
    • http://wofaketizezoja.epizy.com/manual_archive_outlook_2019.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_0b510ba7c4f646d5a6be084cb09d1ee5.pdf?index=trueIn PDF document text
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_0cfc64dc06d14426b055ac393254339d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daxemo/sikusab.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/how_do_i_get_real_time_quotes_on_thinkorswim.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/29213376828.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_off0000fafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFC 4960 bytes
SHA-256: 5895f5e3543101e2f85b2ba0e08eff467b0075917a330e0fcae3052423fc27a6
font_01_sfnt_off00010bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEF 10972 bytes
SHA-256: 6553a7a24683770e445a92fea60c3c78307cee025b6e78e35485b92409cc7816