Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8304f7e19dfd685…

MALICIOUS

PDF

87.3 KB Created: 2021-03-05 18:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3ba842a0683787eff33ea5fb108257dc SHA-1: 53049d45b315caf86facedd08d4841b9591d1498 SHA-256: e8304f7e19dfd685699592c4c8d0d134a25f1386e5ea2e49b8615fb0ee9767e2
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, flagged as a PDF link farm and detected as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, contains references to car maintenance topics, suggesting a lure. The presence of embedded URLs, including one pointing to 'leonvi.ru', indicates an attempt to redirect users to potentially malicious sites, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=how+to+change+honda+transmission+fluid PDF link annotation
    • https://cdn.sqhk.co/livulopo/jggGRje/guduf.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/karcher_2400_psi_pressure_washer_w_honda_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/whfjbpj/pictures_of_color_snake_tattoo.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/what_is_the_phase_variation_range_for_reflection_coefficient_in_the_transmission_lines.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/jiVjcgi/sefegufopo.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/ifhhrb9/diwixasafiwonew.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/jejgjih/waze_apple_carplay_volume.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/dhe6xhb/zombie_strategy_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ibihihs/monoseganuwodomujamuri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_a252e36e06ad475f931e9f8b73231a5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/bala_bala_english_song_mr_jatt.pdfIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_9f606d7a76d14fe88fa1b350d119d827.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/74215930914.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/vamomubupa.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/15688997106.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/syncrowave_200_settings_for_aluminum.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/zusigizotikazawe.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_7992702fc97c443a93e5bea8d1c1d698.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/free_bunting_template_for_word.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/35482631816.pdfIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_e753c950815b43da8ba838c80ec1c22b.pdf?index=trueIn 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_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 5488 bytes
SHA-256: 4dafc370b4e1424b12bf9e8beafbbfe6772de3b3b42b5616e2078ff7156ad0b4
font_01_sfnt_off00012947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12947 11272 bytes
SHA-256: 2adcd9ac57d3392beb0b46118fa5bc4ddd115b5163f8edfa3cc6261de29424a8

Open this report in the interactive analyzer, or submit your own file for analysis.