Malicious PDF — malware analysis report

Static analysis result for SHA-256 700aae965a2cab6f…

MALICIOUS

PDF

81.5 KB Created: 2021-04-06 04:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9477995c0819b3e50cf1cf692d1c82ac SHA-1: 536a59656894ae17a3beb6872b992390113af86c SHA-256: 700aae965a2cab6f54e488f0fafba80dabba4f4bae7b8e4a2620c7c846617dc8
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam campaigns. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=mandaluyong+zip+code+wack+wack In PDF document text
    • https://rifelejoxew.weebly.com/uploads/1/3/4/3/134330737/jadok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474752/normal_5feb7534ec3f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459318/normal_5fc9111e75415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_60136364d157e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_601aaa0940f98.pdfIn PDF document text
    • https://saselafe.weebly.com/uploads/1/3/4/8/134894966/af21f17c3.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/xajotozavudoxodepamu.pdfIn PDF document text
    • https://jagedebake.weebly.com/uploads/1/3/0/7/130738918/gutubawuzezi.pdfIn PDF document text
    • https://sefenavimeta.weebly.com/uploads/1/3/4/8/134885596/64a5eb145370ad.pdfIn PDF document text
    • https://xuserufibizu.weebly.com/uploads/1/3/4/1/134131258/punoweru.pdfIn PDF document text
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/xijiseraxuzupesateza.pdfIn PDF document text
    • https://kubasujile.weebly.com/uploads/1/3/0/7/130776158/576530.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mudotepejix.epizy.com/84236976622.pdfIn PDF document text
    • http://todamabofadufod.epizy.com/traductor_archivo_ingles_a_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/website_offline_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/biblia_de_estudio_reina_valera_en.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/what_happens_when_stock_moves_from_otc_to_nasdaq.pdfIn PDF document text
    • http://sonisan.epizy.com/reading_practice_test_ielts_with_answers.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_47733b0f10394876b62d7857fe5a43ab.pdf?index=trueIn PDF document text
    • http://kumagubugudaxu.rf.gd/54808123875.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_5177e63d55e049e18f01ac1763eed977.pdf?index=trueIn PDF document text
    • http://xulaxun.rf.gd/prologue_to_canterbury_tales_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 5084 bytes
SHA-256: 4a5e7101b82d8691b74558b373e1376efa961c46d50990208a98e7bb27bcb4bf
font_01_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 10844 bytes
SHA-256: 16a96da804d866fa2c766e0719f0a8f0b458a8aa6af63fa484cfaf53ef6074f1
font_02_sfnt_off00012914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12914 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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