Malicious PDF — malware analysis report

Static analysis result for SHA-256 30966fb2395f5921…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 16:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c5d116c07d84c1878289422011647636 SHA-1: b22e8ed7b1160ec5e9b9b050520215b242c24e15 SHA-256: 30966fb2395f592191bbb2b5d508b2b7820797b71b2d14d36c02938cb038d5e4
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 0.9997

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/award?keyword=loan+application+form+format+pdf PDF link annotation
    • http://sawemawe.mywebcommunity.org/how_to_clean_aroma_rice_cooker.pdfIn PDF document text
    • http://gonunimob.iblogger.org/62819059612.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/historia_de_la_frontera_mexico_estados_unidos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_6003a189e3240.pdfIn PDF document text
    • http://gojepifega.22web.org/cession_vehicule_2018.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/22436355125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_5fe62831044c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/puwolasat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56c740d-7f18-42ab-ad48-d5fa03dda697/bissell_power_steamer_heavy_duty_3-in-1_steam_mop_reviews.pdfIn PDF document text
    • http://pimibini.epizy.com/49280875869.pdfIn PDF document text
    • http://zokazote.rf.gd/gazezurisetaluvalew.pdfIn PDF document text
    • http://vevemelimo.epizy.com/malayalam_cherukatha.pdfIn PDF document text
    • http://pizidera.rf.gd/junuw.pdfIn PDF document text
    • http://zajaduluf.epizy.com/67040650170.pdfIn PDF document text
    • http://womidelere.myartsonline.com/dna_blotting_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/6534558398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac94f7c-32d4-4f8a-b025-40f36aceaf7f/61247462670.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/dojanexawowosa.pdfIn PDF document text
    • http://lebodevafetag.epizy.com/causative_verbs_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2998466d-8110-45c6-a485-3f5c8aa2dd13/how_to_fill_air_force_form.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_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 5064 bytes
SHA-256: b7466788c25864075580d4cd942ce79f3daef48f9d64e564a31767e74fd1cb1c
font_01_sfnt_off00010330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 10680 bytes
SHA-256: 1efee58ee600f3559d72c8bba597ea994d5e1ea7628240c73d64e939a99722be

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