Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0a77815fb4f8f4…

MALICIOUS

PDF

77.9 KB Created: 2021-02-19 17:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1b06b204a42c8d82e8d9c6c44c109264 SHA-1: b8a24a8db6d69924cfdb3615c945b53e8ee742dc SHA-256: 1d0a77815fb4f8f4e6ed417714a4a6c98364ca2df912b28ff46808b538737b89
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to potentially malicious domains, as indicated by the 'PDF_URI' and 'EMBEDDED_URL' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect the user to a malicious site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=is+briggs+and+stratton+a+good+lawn+mower PDF link annotation
    • https://cdn.sqhk.co/vozeseseber/NCjd8gd/59771471720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_60234fc742ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/higVzig/fujikuzax.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/6jbFjhf/pocket_mine_mp_sur_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/ijwlOig/89553186927.pdfIn PDF document text
    • https://cdn.sqhk.co/geroterunetu/AhjjjeS/roll_through_the_ages_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/bavozazav/Aokdghe/jump_over_the_moon_brain_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/ibH1GNq/crush_the_castle_3d_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/qrjhjcK/41222420560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5fce3631ae323.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/hhVfjcv/wrought_iron_hanging_bottle_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/Hgeihjc/gowavajot.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/hdgfieD/pikajokavenokokutukuxirez.pdfIn PDF document text
    • https://cdn.sqhk.co/wusoxopejezo/jcgeii3/28962234403.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/purawuma/classical_conditioning_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/braindead_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/blessed_be_your_name_clarinet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/83427716068.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_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 5312 bytes
SHA-256: 3700db546b6f504893f2ff50b40be4f7e3c9d7b72fca1fd42740679f6c0d247a
font_01_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 10916 bytes
SHA-256: d594de6281dc751fb9fe117c81e80a80b70330cad9a605af86c832eea29543ff

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