Malicious PDF — malware analysis report

Static analysis result for SHA-256 9903576f8ccf2be8…

MALICIOUS

PDF

78.8 KB Created: 2021-03-22 12:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c053ef1195c56d5bb06b1dc569653659 SHA-1: 12d13b19bcecf9662f06bd81812724c142245935 SHA-256: 9903576f8ccf2be8ed5fc824c8b3a37f8db1447f270bff62da70e5d65b7b928a
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-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://resalured.ru/strik?utm_term=samsung+printer+xpress+m2825dw+troubleshooting PDF link annotation
    • http://serururepus.scienceontheweb.net/ge_corded_phone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5fedda2de72b1.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/hybridization_chemistry_questions_and_answers.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/kitchenaid_induction_range_with_double_oven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_602297b71ddf9.pdfIn PDF document text
    • http://kovativegapok.getenjoyment.net/jefivewunijanubopidorir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fe152607d64b.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/lisike.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/33227254576.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_07b82e6237424b14bdfb5fcd2d1519e9.pdf?index=trueIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/48609468404.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_47582b678f9a4e6f866dee1fe7a7b663.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/lotusekunirozazif.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/76034904744.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_0866595fb4474a1b87041efcc7d35f51.pdf?index=trueIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/59818211478.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/tiwutinikebigajusi.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/mockingjay_book_google_drive.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_5d538f3592b7412f881f9a9efdd161ea.pdf?index=trueIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_70d4749fab0e45749c8107a30a6903f4.pdf?index=trueIn 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_off0000f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF365 6224 bytes
SHA-256: 28a005417355c2cacdf8e26324a7bb6b791329ae5e15188e40cac7e41c5b45d4
font_01_sfnt_off00010874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 10928 bytes
SHA-256: ae4d87f0108eb62fb33b81ebb18cbe7a4466c8cf7571170920b3f1c3b66ec642

Open this report in the interactive analyzer, or submit your own file for analysis.