Malicious PDF — malware analysis report

Static analysis result for SHA-256 58804e84716d9063…

MALICIOUS

PDF

70.2 KB Created: 2021-04-09 07:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9507f4605134ad9deca16dcb6738e2e8 SHA-1: 7220eb1faa43489587cdecbc15f2bf49462c17a1 SHA-256: 58804e84716d90631028982e1883ee3e3ebb141fe20650674deb50bcf7a91fad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://midufefew.ru/strik?utm_term=granblue+fantasy+art+books PDF link annotation
    • http://wurulef.22web.org/sodofutifavifazutura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474980/normal_5fc85ef97461d.pdfIn PDF document text
    • http://dalovujunaguk.22web.org/57657855068.pdfIn PDF document text
    • http://minosiw.22web.org/kumodurepepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_602b3f8cc673f.pdfIn PDF document text
    • http://mifetuvoge.22web.org/realismo_juridico_aleman.pdfIn PDF document text
    • http://vabodulesofife.22web.org/how_many_sweet_potatoes_is_1_pound.pdfIn PDF document text
    • http://givikoninebana.22web.org/boxemavak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5fec4970d787b.pdfIn PDF document text
    • http://zarepaputome.iblogger.org/notice_to_terminate_month_to_month_rental_agreement.pdfIn PDF document text
    • http://mupulopi.22web.org/61959825913.pdfIn PDF document text
    • http://nubilejoso.iblogger.org/abordagem_cognitivista.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488815/normal_60345e97de722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lasekoto.rf.gd/apostille_texas_form.pdfIn PDF document text
    • http://xalikitu.epizy.com/learn_python_the_hard_way_2nd_edition.pdfIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_250f350b550b49568965350682e168d4.pdf?index=trueIn PDF document text
    • http://tasetexogop.epizy.com/cash_flow_statement_report_in_sap.pdfIn PDF document text
    • http://kupavojos.epizy.com/probability_and_measure_book.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_b0c33420e3d2495bab68d19c0d415c1c.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_b4447ae489ee466eba5b1537bbf5976e.pdf?index=trueIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_07dcc263a1ee45cea46f8782e990b434.pdf?index=trueIn PDF document text
    • http://bipedok.epizy.com/rapoxenixudo.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_d5bbed5711f14962aac26288a8e3c537.pdf?index=trueIn PDF document text
    • http://doxewadafexe.rf.gd/categorizing_worksheets_for_4th_grade.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_off0000d34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34D 5100 bytes
SHA-256: 29c2d85ebca4fa71346d58e52e46f019b04dfab7853ab58871a0ccc0c9e75e4c
font_01_sfnt_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 11336 bytes
SHA-256: f7e1a92fd2c474f61c237f802350ba0f8599b1447a6f54c790f5a2458bbe7810

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