Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e6a237aa09640e…

MALICIOUS

PDF

73.6 KB Created: 2021-03-05 10:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: acea1e700b428131cecc0b540d141970 SHA-1: a5c5d0bd5495323b720abb699620103d7f69db1a SHA-256: 23e6a237aa09640ef487bbeb88067ba3430aa89fe097d8cc38ccd8a0f712f7bf
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The embedded URLs and the document body's content indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://seumenha.ru/strik?utm_term=can+you+be+late+to+walmart+pickup PDF link annotation
    • http://zabemaladameg.medianewsonline.com/21162064407.pdfIn PDF document text
    • http://aslixan.com/ciara_i_bet_mp467qko.pdfIn PDF document text
    • http://xonigej.mypressonline.com/why_are_my_outdoor_lights_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/LjeiRo8/70351636095.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/9777854.pdfIn PDF document text
    • https://cdn.sqhk.co/rasufizo/hfignif/62814566228.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/hgdhdGY/90884085353.pdfIn PDF document text
    • https://cdn.sqhk.co/xopimuje/hBhhcJx/piminisulalosesutajifaf.pdfIn PDF document text
    • https://cdn.sqhk.co/nubalevuvem/cidicFO/76301451257.pdfIn PDF document text
    • http://shopbest.online/resumen_del_articulo_49_de_la_constitucion_mexicanaxgvld.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/bukazolitew.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/hjgmoid/80_s_hard_rock_music_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/gddgfoB/blend_it_3d_online_game.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/54315961777.pdfIn PDF document text
    • https://ketabanajav.weebly.com/uploads/1/3/4/7/134707818/4a06c4c8170aad.pdfIn PDF document text
    • https://puruvafapazono.weebly.com/uploads/1/3/0/8/130815059/keguwubixetig.pdfIn PDF document text
    • https://vumokaxizojomij.weebly.com/uploads/1/3/2/6/132680848/bffd4.pdfIn PDF document text
    • https://cdn.sqhk.co/murefazomejo/gjwlihG/srs_light_mercedes_vito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/460d1c57-1814-4889-844e-48606d5e3d18/65160674617.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/10116947415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f6ca1a-048b-48b8-9bca-5bb3252bcca2/giletofanovopalorubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33dfe952-3df0-4803-872d-85d49fafde1b/86405851016.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_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 5204 bytes
SHA-256: b74b1ad4b7d9c7168b43a6610e4fe4b8aa9e1c797829d69e190c3ecaeb2e871d
font_01_sfnt_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 10360 bytes
SHA-256: 88a006cba5432a6ffc57ad7b58dec046376879ecbcffe9d8f0ddca75f1030792

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