Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d4c4012c8d25df…

MALICIOUS

PDF

64.1 KB Created: 2021-02-22 18:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d2dbd69882228370a1f7c0af068ca61f SHA-1: 068402d8e3d1f94550aad9eafcfa8928655bfc4c SHA-256: d2d4c4012c8d25df7aceb6e7189b13967e557aee35b462a4b7fb6c03a0dcadc3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link leading to 'bologen.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of embedded URLs and a link farm heuristic suggests the document's primary purpose is to redirect users to potentially harmful external sites.

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://bologen.ru/strik?utm_term=how+to+fix+a+remote+garage+door+opener PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fdc3a1d6ef2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384301/normal_5fe2a23720da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_601cf8f0b54f3.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/4289564.pdfIn PDF document text
    • http://skidki-day.store/99198449642i7vaa.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/8jigjKz/ropusuwoxasogajo.pdfIn PDF document text
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/jinexaremef_luzodurezekanor.pdfIn PDF document text
    • http://xrootunited.com/rukomiwixorebezogodguu52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_600b50efaa6e0.pdfIn PDF document text
    • http://meinekarten.best/american_history_x_full_movie_redditp3eie.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxawexa/pjfaYii/i_don_t_know_song_lyrics_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_601729cfc0853.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/hfTBL0d/23662914052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/falejogajir/json_multipart_form_data.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/action_mirillis_crackeado_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/aadhar_online_by_fingerprint.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/kewexefovurefoxukibeliz.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/sodezomobewoburu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64B 5060 bytes
SHA-256: b95e173bda908124c3568523011ee0522e0a56bd0e207f1d7398adf44128127f
font_01_sfnt_off0000c77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77A 8740 bytes
SHA-256: 5c18b4a7ee6c4d1bf720f5084896cad854f1563153242e11f870eb034699edd8
font_02_sfnt_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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