Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a5cfcd5271fe7c…

MALICIOUS

PDF

74.5 KB Created: 2021-02-25 04:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9a71ffe806a9a3466c5287875a5d8566 SHA-1: 70114a404b0fb97ecc78d8fd127f941d6da4a25e SHA-256: e0a5cfcd5271fe7c81361625eeaec281c5ac569f5ad8734f7787a3aaadba74cc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The presence of embedded URLs and the overall structure suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=minecraft+bedrock+1.16+jungle+island+seed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5fd9a352e8dbb.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/free_birthday_invitation_design_templates.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5fc587526d244.pdfIn PDF document text
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/1177114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fd1e876585a0.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/inductrix_fpv_pro_upgrades.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/sears_washer_and_dryer_combo_sale.pdfIn PDF document text
    • https://pogiwubuwafax.weebly.com/uploads/1/3/0/7/130775808/garogo-kuforusiguramet-ritaz-gemudugisekimig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vazavaxajude.rf.gd/67006543354.pdfIn PDF document text
    • http://sibexelopuni.epizy.com/behringer_x32_firmware_3._07.pdfIn PDF document text
    • http://zozinidusekoz.epizy.com/liditadufovomudomon.pdfIn PDF document text
    • http://dugexirawotuv.rf.gd/pokemon_go_grunt_guide.pdfIn PDF document text
    • http://vonizevugopu.rf.gd/aggregator_vs_platform.pdfIn PDF document text
    • http://sefenepisepaje.rf.gd/47958952317.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_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 5712 bytes
SHA-256: d2eb2215c464335ffcd6bc40de96e03d487f7902aa270f8de08ae3ae72e0b9ed
font_01_sfnt_off0000f738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 11132 bytes
SHA-256: 1a375a7ad0002ec1fb9221b3103ede03633820d4ae1c7157ac13f773c7cef683

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