Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c0a09b11bef01e…

MALICIOUS

PDF

82.0 KB Created: 2021-03-03 18:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c42f6b64cf46da81847f76ac3743d7c3 SHA-1: 4465771bba3786f6adfabdaad7b923d676d5975f SHA-256: 48c0a09b11bef01e82826cf05803e443cbbee43afd7638e71d500088a61c131e
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious sites, as evidenced by the PDF_SEO_DISPOSABLE_LINK_FARM firing. The embedded URLs, such as https://gimoguvi.ru/strik?utm_term=bose+lifestyle+48+serie+4+bedienungsanleitung, are likely part of a phishing or malware distribution scheme. ClamAV also detected this as Pdf.Phishing.Trojan, further supporting its malicious nature.

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://gimoguvi.ru/strik?utm_term=bose+lifestyle+48+serie+4+bedienungsanleitung PDF link annotation
    • http://bella24.xyz/gokavelisefijudd0zdh.pdfIn PDF document text
    • http://my-credit.info/japikezotodisaxipotdp52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481819/normal_60052f3e3ae20.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/ryobi_airstrike_nail_gun_not_firing.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/44774301995.pdfIn PDF document text
    • http://nuverlites.online/xevorumonisiropefmpgma.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/fQhhdia/72068223630.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/cJkjeyE/53768116054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467036/normal_5fd2ac9d2fd26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_602d3cc8196af.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/marimejerebo/9770079741.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/sherlock_holmes_a_game_of_shadows_full_movie_download_in_hindi_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/tafolirolurivosem.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/original_dd_races.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_off0000feca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 5648 bytes
SHA-256: 57f7acde2a6f8abc69baacedf1ccfdc276430a2f08560f3da7f440e63fabc76a
font_01_sfnt_off0001121a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121A 12464 bytes
SHA-256: 6ee4eeea7191cc9db469effa5d77800a7cda5ad2612b6fc6250a2f863c4fea75

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