Malicious PDF — malware analysis report

Static analysis result for SHA-256 487d197ceb9d33c4…

MALICIOUS

PDF

78.5 KB Created: 2021-03-30 17:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 28198338a3ad0f49efc301ba3ba75a6f SHA-1: 186965a558d5680012c8f0dbe6e9f1808f81df4d SHA-256: 487d197ceb9d33c4980d74fc43794f2d1dce4c03d44016c0f7af4afcca040b64
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm and a lure related to checking pandemic EBT balances, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://mezovuduw.ru/strik?utm_term=how+to+check+pandemic+ebt+balance+online PDF link annotation
    • https://lupilizeranal.weebly.com/uploads/1/3/4/4/134460298/2873255.pdfIn PDF document text
    • http://fitotim.iblogger.org/11651657106.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/d4358b0352.pdfIn PDF document text
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/3425243.pdfIn PDF document text
    • http://ruwegekugite.22web.org/kipetexusipewoj.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/xutifodelavu_zawamigu_kilom.pdfIn PDF document text
    • http://tonojodozif.mypressonline.com/coastal_carolina_university_map.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/bluejackets_manual_20th_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_ab2438f091a74e1e8e5167d53811e90e.pdf?index=trueIn PDF document text
    • http://wupewujivijulo.epizy.com/682995307.pdfIn PDF document text
    • http://mivogunav.rf.gd/nizujedenimibixududa.pdfIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_643f5656d0e4440493d1b9aa1a515635.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_fe374e45888548f3b4da69fd27cc5b70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/48584957003.pdfIn PDF document text
    • http://rekekolulopar.rf.gd/maxulalogagori.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/game_of_thrones_book_series_wiki.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/jodubujoriwifosabawa.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_e7209dd9434549e7ba3e3270ad78f273.pdf?index=trueIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_7a9f35abb1f94377bc903c50518931e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/alpine_cda-9884_aux_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/49733977583.pdfIn PDF document text
    • http://kiwusegofavuto.rf.gd/maxoburu.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_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 5296 bytes
SHA-256: e042dde8b1237ad94b794a8ebccd6ef5d627757c18a50648cd6e1c08ed9a977e
font_01_sfnt_off000106e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E5 10984 bytes
SHA-256: 1414fd6460a5657f31fef70dcd4b80f0785a8daaeeeb5420cc7bd7466352ce36

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