Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c587e22a0517f6f…

MALICIOUS

PDF

87.1 KB Created: 2021-03-10 08:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 718450a3b955284d657feb73a98cb31c SHA-1: 396f5c1eeb19a787181e70ea78e2698180cbaf09 SHA-256: 5c587e22a0517f6f9c78b29411085783c43cd6c7ed7e3ccf4acd59302abb15f9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=argumentative+essay+about+smoking+pdf In PDF document text
    • https://cdn.sqhk.co/fogibadeku/ij7LHhg/refojopigawotuxuwujipa.pdfIn PDF document text
    • http://dabedera.mygamesonline.org/how_to_write_theta_dot_in_latex.pdfIn PDF document text
    • https://vazozedirasamib.weebly.com/uploads/1/3/4/0/134013018/sukunusur_tumuxasutigefiz_vojimigusejanaw_tudefisam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425230/normal_60327f124c641.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/qifyguk/fabonebaxumalog.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/zakijid.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/7413990.pdfIn PDF document text
    • http://pozidekozavam.iblogger.org/fan_remote_not_working_hunter.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/71072589757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5fe7e9e48f132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5fc725129d9b6.pdfIn PDF document text
    • http://wopafopu.22web.org/how_to_love_thich_nhat_hanh_free.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/msi_790fx-gd70_cpu_support_list.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/lerelewajelesit-selubotufabebu-mutemuzax-bifipeliru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_5fd66f449d6f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riremeg.rf.gd/gefewenililajijajebogorob.pdfIn PDF document text
    • http://golofupatawef.epizy.com/49532342200.pdfIn PDF document text
    • http://nuzowudip.rf.gd/impostare_mail_pec_aruba_su_android.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_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 5684 bytes
SHA-256: 27f35c53bb808fa69759763866f7eec306c886ee42a6381d83926ce525907da7
font_01_sfnt_off00012a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3E 10824 bytes
SHA-256: e6d5be74f0b9e4fb060f057b8d5bbdcfedfb36cf7e59d1102870c9b399c84611

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