Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f276d00f241039b…

MALICIOUS

PDF

76.6 KB Created: 2021-05-20 01:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9c70b586b0a1c091252183b5911696e6 SHA-1: 27f6f0067bf751b31dd2d0e87378dbad320edef7 SHA-256: 7f276d00f241039b39769432d7f240422ea484d88594ff7f3f5cd607048504d3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking documents, but one primary URL points to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via a link farm. No scripts were extracted, but the PDF structure itself is used to host and present these links.

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 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.
  • 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://gimoguvi.ru/strik?utm_term=como+elaborar+jabones+artesanales+en+casa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450898/normal_603a17444e30a.pdfIn PDF document text
    • https://wenojuzak.weebly.com/uploads/1/3/4/2/134265903/kalokililebuko_fixasavozured_bemisujubizevid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502439/normal_604988b8b4efb.pdfIn PDF document text
    • https://nedagipi.weebly.com/uploads/1/3/4/7/134724638/kubolupo.pdfIn PDF document text
    • https://gekonoxare.weebly.com/uploads/1/3/4/4/134480638/rubarefubadava-berubazipefo-gigoro.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/6903328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420617/normal_5fcaa792cf75c.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/warapagefasovi/ionic_pro_turbo_air_purifier_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff564c7-5cb5-439a-b975-83e9e21eaa48/how_to_cook_giordanos_frozen_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/can_you_search_a_scanned_document.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/38604445872.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/commercial_treadmill_price_in_china.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/kolojunojo.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/britax_b_safe_car_seat_washing_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/ayushman_bharat_eligibility.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/pikaduxewox.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/44163860038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f4c6bb-62f3-4ceb-b674-234f1859a28c/4832370587.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/74240361392.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/39818561655.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_off0000e1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D3 5064 bytes
SHA-256: 864594f0e977af35919d20249cd2989c9aa82338f962795bcd7fccb02b90d335
font_01_sfnt_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000fb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 12040 bytes
SHA-256: 5835adcf61205325db719f48e02983cd3ba861cffb35a82c214cbaf78b5cd9a5

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