Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa8802f7bbf1b77…

MALICIOUS

PDF

78.3 KB Created: 2021-04-05 04:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae07ff7264cb2cd72955479a4dfa514e SHA-1: ee14e2802140ce834556933c49a50644dfb3f6f2 SHA-256: 8fa8802f7bbf1b773737934559a5cbabaaa3a91f0c6aa4c15ddfaaa5cd999aa2
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=star+wars+d20+droids+pdf PDF link annotation
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/bofekemuxavetofu.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/xikabuwaxamonuginu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_6002df1507903.pdfIn PDF document text
    • https://gitazedekof.weebly.com/uploads/1/3/1/3/131398323/ce3fa99d854315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_603608989eb3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_6002d9366a4ce.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/gewadipedobuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_164a4bc0c31b4f99893fdbc7be04efbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d33f88-19f1-49dc-af9b-d6d0ec2b3ab6/rapizilupimufodakanavav.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_a7f64a03776b45d78cf65d8689e7db54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd96446d-fe31-4bf7-9824-4a89709396fe/real_estate_class_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1456ee6-d9b0-412f-a2c0-2e7e0e8653a9/mebova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b708da3e-cca9-4935-970f-0010c8889e26/14738841076.pdfIn PDF document text
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_4ac94ef83da94d77a20aebde5de1dfd8.pdf?index=trueIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_f8272fc89f004ad796397138b65f29e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c81564-8454-4f67-b168-b12a36f547e1/88831902253.pdfIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_4019175f15564c559cdb6102e9794890.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5047605b-860d-446b-8d65-80544f2565ae/advantages_of_non_destructive_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2f9f4c-1388-42ea-bd7a-2b6c1df24b90/leche_materna_traducir_al_ingles.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_off0000f376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF376 5472 bytes
SHA-256: c2e1772360f4adf037ed3740faa25f2b2ec52a98c10331cd7d4edfa400d49013
font_01_sfnt_off0001062f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 11080 bytes
SHA-256: b8c5fc22ec70446b5d1448ce68ea24bf0e9b914115ca2f24e2d050a412839036

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