Malicious PDF — malware analysis report

Static analysis result for SHA-256 04eb6f4050eab257…

MALICIOUS

PDF

80.1 KB Created: 2021-05-25 12:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aeb9b2a20067f3475fc7bf422bac6077 SHA-1: 5489beac62e16728607843878d6b08aa4ae3d3e3 SHA-256: 04eb6f4050eab2578e8afec88758fb5de2f92f18bed94eb3985618e44f0cb839
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URL pointing to 'xezojetit.ru', which is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate maliciousness. Although no scripts were extracted, the presence of external links and the document's structure suggest it's designed to redirect users to a malicious site, likely for phishing or to download further payloads.

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://xezojetit.ru/strik?utm_term=programme+d%2527entrainement+preparation+physique+football+individuel PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5fe02fefea064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_600edf16d5f43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_6005e87b8ab17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_6016d15a98796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_605c00fbd07f9.pdfIn PDF document text
    • https://waxagenejefud.weebly.com/uploads/1/3/4/7/134712445/belivakesibiwupeb.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/5362774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fd76e910dc13.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/solonebosop/nuwelowebedukopiminotega.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/49629067916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54e2e28-f570-45de-aa50-cb9153ff8d21/52527932243.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/ketixili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ca2c15-7714-42b4-a374-816bb2d45618/a_raisin_in_the_sun_movie_rating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c3beea-489c-4fbc-92fa-c557d78bc9b5/can_you_put_frozen_chicken_on_george_foreman_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55bdf59b-e36a-425c-bed2-8f4d42d897c3/descargar_biblia_reina_valera_1960_gratis_en_espaol_sin_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/84092336429.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/xawanuxenusolajuxikibef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ec14a8-149e-4ed0-8e77-40a22cdd3f9f/93583091614.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_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 5916 bytes
SHA-256: 48dfee7eade4e64f03ef7ad401637949f3349ba66361648e4e5c934828ac3e42
font_01_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 12700 bytes
SHA-256: 4c9fac4b09613bb75e30eea1f4b93d380c3d628b9aeb03bf84043f92d15146df

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