Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd04e5da320312d5…

MALICIOUS

PDF

93.6 KB Created: 2021-03-28 22:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63e08a34867db73a16414bc97b4de919 SHA-1: c519289e5c8869440b0d0c3586ce2ce362ff7c8b SHA-256: dd04e5da320312d52ae79bd984315f969eaca066c87b42e9ff5d902459325bb5
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-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://ponafet.ru/wix?keyword=bru+n+water+spreadsheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476941/normal_5fe50e6505062.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/9435717.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/matlab_2018_download_size.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_605ee15ec3446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450041/normal_60477f493b6bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388285/normal_5ff3eac92686b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fde3b7dc04ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_6026d24c9e374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_60473aacb1a93.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/89983890004.pdfIn PDF document text
    • http://vozivovog.scienceontheweb.net/the_way_to_happiness_l_ron_hubbard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_604b2dd172a1b.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/aulas_de_espanhol_para_iniciantes_em.pdfIn PDF document text
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/pediz.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/813c7a5e744b1eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lofunadex.myartsonline.com/gramatica_portugues_para_estrangeiros.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/parking_ticket_appeal_letter_disabled_badge_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/rilofinavun.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/bojizofepexu.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/what_is_the_theme_of_the_book_the_fault_in_our_stars.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 5156 bytes
SHA-256: bbe9cc9e6deb5e038be1b333564984aa5736499b6be1ddcf7e1232315e4c1e82
font_01_sfnt_off00012bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDE 11164 bytes
SHA-256: edcab4ed46f1a4b1423217c5423b2e653d12bfa548c830837ff906ded7871f48
font_02_sfnt_off00015207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15207 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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