Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde2f2ee0501d9bf…

MALICIOUS

PDF

75.3 KB Created: 2021-02-21 06:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4ebd98932a5d0fb564366ea44d8f991e SHA-1: c44714ae9be77c0cc8329585f2847673fafba97e SHA-256: fde2f2ee0501d9bf157ae85657e9e38c766e38870a43d7a58b618c52e7c4cd30
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate malicious intent to redirect users to potentially harmful content.

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 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://leonvi.ru/aws?utm_term=04+honda+rancher+350+oil+capacity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fd17dbe5a5b8.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/hgjjjeW/eagles_band_greatest_hits_youtube.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/6730668.pdfIn PDF document text
    • https://jasujidavoja.weebly.com/uploads/1/3/4/7/134770870/laxukukimawepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60175c608053f.pdfIn PDF document text
    • https://kewupadaduroj.weebly.com/uploads/1/3/4/6/134689326/c6a4c121.pdfIn PDF document text
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/jedetosit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_5ff03e2b3e792.pdfIn PDF document text
    • https://falerelijiwega.weebly.com/uploads/1/3/4/6/134612416/e0f15aea.pdfIn PDF document text
    • https://cdn.sqhk.co/tesigasefaxe/wjchedd/mudding_trucks_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/lghgijc/green_bubble_gorgeous_grand_rapids.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_601b1f45d290d.pdfIn PDF document text
    • https://nalirukixew.weebly.com/uploads/1/3/0/9/130969663/6600001.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/pafiganovavi/aap_se_aashiqui_song.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/65039579136.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/finding_interior_angles_of_a_triangle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/30210050720.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/uplands_school_sandhurst_ofsted_report.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_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 5508 bytes
SHA-256: af518a375adbcef36b28b4dce8edf8691ee492fdcaed2b8b1be122257bb65e06
font_01_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 11340 bytes
SHA-256: 0c03f02a00513434f12bd05d019c8d691cd2280b4799d4b10ac5f9f472ab1a5c

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