Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3553de3b8e0b11…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 22:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2cd00291542c02772c9e38df894db28a SHA-1: e1d5bd7795effe260e0ab7ac3660540751f92b83 SHA-256: dd3553de3b8e0b111f3f7ee14322f040f1ee96f972c8cd49d7769eee105a34aa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the link farm heuristic strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=cpp+calendar+2020 PDF link annotation
    • http://suzamakulamuj.mypressonline.com/shark_pro_steam_pocket_mop_pads.pdfIn PDF document text
    • http://gaxesujite.medianewsonline.com/dungeons_and_dragons_5e.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/botany_syllabus_for_ias.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/dizop.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/9035344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475570/normal_5febfcbcaf576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fc69133239df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_5fd7819c22340.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/3522898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_604b1719b1989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5fd28d555cd8f.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/54147212118.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/8683274041.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/pobafenekikoxogopijerutog.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/sagesetogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugaroli.epizy.com/budgeting_for_students.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/biddeford_heated_blanket_directions.pdfIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_0b774c39a19742e6bfea2727269dd20d.pdf?index=trueIn PDF document text
    • http://mujelolix.epizy.com/setenilokumugo.pdfIn PDF document text
    • http://lofunadex.myartsonline.com/36991933711.pdfIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_4d4fdd434993457ab792a29da65ffaf5.pdf?index=trueIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_7d1307e249244a13a559ffaa8b01da60.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_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 5068 bytes
SHA-256: 853a6b19836da9a4203e88c6f42325ae387f15fd6027cccbc6aa85164b6bd3cf
font_01_sfnt_off00010cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 11520 bytes
SHA-256: 91a3e528d30482e220745ca0cd3c230b18c1ba734f5020cbb028c1e8f4e4cec0

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