Malicious PDF — malware analysis report

Static analysis result for SHA-256 b339b5a031503a1c…

MALICIOUS

PDF

73.1 KB Created: 2021-03-07 09:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f561623aec5fc0d2bd5c9fb3f0314db1 SHA-1: db7efdaf396dc3c488d09eca623023648c2df00d SHA-256: b339b5a031503a1cb67def5f75cab3ceeafdfe16be20d2d7064a526bc7d2fa2d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/award?keyword=asus+router+rt-n56u+access+point PDF link annotation
    • https://cdn.sqhk.co/wumerelup/eujfgfv/pottery_barn_sherwin_williams_coupon_2019.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/5141317.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/Qaicw2M/sabovine.pdfIn PDF document text
    • https://cdn.sqhk.co/dalogunutixo/Xnggphc/gorunetodozajuwu.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/0d98ef9ece29a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5ff460f48b108.pdfIn PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/gimefam_sufigaposapexit_zikebo_gamejuj.pdfIn PDF document text
    • https://feroxetisilujux.weebly.com/uploads/1/3/1/4/131409167/5543d4961de0703.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/3146969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_5fe6fbefe97e8.pdfIn PDF document text
    • https://vedatirujoxe.weebly.com/uploads/1/3/1/6/131606280/4773366.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_60062db541103.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/qTUXghi/mifujuvaxufazisep.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/tapikumezuf_dixanebilerumat_purowin.pdfIn PDF document text
    • https://pawagidi.weebly.com/uploads/1/3/1/1/131164052/6645790.pdfIn PDF document text
    • https://juguxusomusivu.weebly.com/uploads/1/3/5/3/135327365/loposaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farezelof/nfl_power_rankings_bleacher_report_week_2.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/awei_bluetooth_earphones_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/89109362787.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/ninudigimikajolufimekipun.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_off0000e26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26D 5196 bytes
SHA-256: 4fb7dbaaad00a3387e84a3a69ba6400cc4bf7e5c8f7170424a18ecbd62654430
font_01_sfnt_off0000f428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 10196 bytes
SHA-256: 5a82e91f3cc4761b9374b2a4115f19baf141cd9d3706a20eccd7cd0ab0e4bf5a

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