Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fa6fdfbd343051…

MALICIOUS

PDF

85.8 KB Created: 2021-05-23 11:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 54732a0147125873d3e21432f82272d7 SHA-1: 9d350a2d28e78b2709aa25a0a80462c6d0825703 SHA-256: d9fa6fdfbd3430511441cbb1259d7cd637bdc2bc306ee053f0fd4aa4191da0aa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=how+to+cheat+money+in+car+parking+multiplayer PDF link annotation
    • https://jivowewowigopap.weebly.com/uploads/1/3/1/6/131606746/lelexe_fivulapeza_vimigonakow.pdfIn PDF document text
    • https://koloxajemixe.weebly.com/uploads/1/3/1/4/131482821/zovig_masuxediso_jasumugeruda_fejalukorex.pdfIn PDF document text
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/ea9d7d1d.pdfIn PDF document text
    • https://siwovipon.weebly.com/uploads/1/3/4/7/134705210/rebesoduvufor.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/sewatarugajitewu.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/kesumasaka/tafatiditugumu.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/how_big_does_a_mini_long_haired_dachshund_get.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/how_many_pages_does_the_book_11_22_63_have.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/where_is_the_lady_of_the_lake_forza_horizon_4.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/peer_gynt_suite_no_1_track_1_morning.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/pukosopibavazekeresituxiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f585b276-b92d-4387-9db0-0c80b795a9dd/15028475411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d976efba-9152-4403-94a3-4738032893b0/ruraduxagoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9211449e-075f-40c5-98b6-8ee2fb3a59a2/39635571302.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa83316c-9528-4905-9edf-75a7af58f04a/does_chicago_style_use_in_text_citations.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/raleremano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87435e90-44a1-4fc4-b3f3-847b4eee192f/60247828795.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/john_lewis_pet_insurance_claim_form_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c408ab-8f38-4fe2-84c4-69226ffa2d92/how_tall_is_the_average_24_year_old.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/spongebob_mock_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/signal_censorship_circumvention_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85546a33-034b-4aab-907a-089c1794fd96/javugedenepokijavexid.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/31845408486.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_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 5272 bytes
SHA-256: f9c09feeba1bf9f0671226a7891f09544b73136590a3fd79786c05b4ed08e21d
font_01_sfnt_off0001148f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148F 11336 bytes
SHA-256: a798b1b08c87d8827036f6bea52f7686eee19b8037f6123dadbc4c777c18933d
font_02_sfnt_off00013b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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