Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e6708c25b071c7…

MALICIOUS

PDF

80.2 KB Created: 2021-02-17 20:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33896d95a89dd2de327b22b47037838b SHA-1: 542b2b063356e2d425a6ba526ab77791cb874494 SHA-256: 68e6708c25b071c795742d277e738ba25f3b296e01708ce4e4e554901994b53b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farms to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to drive traffic to a network of linked sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://baarspo.ru/strik?utm_term=air+force+one+movie+online+youtube PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413000/normal_6006b990e3f13.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/pudilemimirirabu.pdfIn PDF document text
    • http://ductsunlimitedins.com/gixilidaxijajowededakadcwy8.pdfIn PDF document text
    • https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/degizafugowez.pdfIn PDF document text
    • http://cheapestshop.xyz/738590419560juxl.pdfIn PDF document text
    • http://bazis-rostov.com/6th_grade_math_word_problems_worksheets_printablehmbvl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5ff716888f797.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5feecc90d254e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fc79aff6e249.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/wemasediwolofat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_601faae9d9b3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juvuzonowokogu.rf.gd/carnival_row_episode_guide_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/54941836014.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/acronis_true_image_with_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/12349657169.pdfIn PDF document text
    • http://kaxogesidod.epizy.com/jenutovomomejanuzogag.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_off0000fcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 4932 bytes
SHA-256: 9774f87b916d148b36bb0b9f4c7a28c70d2e707a471b1a5887e01268c7536409
font_01_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 11136 bytes
SHA-256: 04f66de784e145a6c2b4baf9f7020892b273435ed890ce6149c72f35afdf3901

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