Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b30f93ba4a506f6…

MALICIOUS

PDF

83.8 KB Created: 2021-04-08 01:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7eaeb335d9ac7ccc72eabf691b91e2b3 SHA-1: 5981143da70dc1c6a35f0fa77a5fe4364c0ff7ce SHA-256: 0b30f93ba4a506f6f082b44f1d6a7aacb1d49a6a69881bfba5071dd3b6c06582
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://soxebez.ru/strik?utm_term=how+to+use+doro+7050 PDF link annotation
    • https://cdn.sqhk.co/mopewedote/d6jehhc/50200276777.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/rdgfhhv/33813218601.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/Pjejc4g/neutron_music_player_eval.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/hhijfer/personal_safety_equipment.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/jddibkH/vanonu.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/Uy5wghK/75184170243.pdfIn PDF document text
    • http://predouche.xyz/how_to_remove_a_quick_connect_sprayer_hosehbj74.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/kindle_d01100_which_generationfpxpm.pdfIn PDF document text
    • http://aarbuz.space/pandoras_box_6_manualuxvfa.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/gf3MieC/iphone_12_mini_gsmarena_price.pdfIn PDF document text
    • http://wonder-ita.space/86482818451adqhv.pdfIn PDF document text
    • http://kozizukexepuf.22web.org/appassionata_sonata_3rd_movement_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/bitulore/gdjd7jh/got7_lullaby_piano_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunuwovadete.epizy.com/ap_calculus_bc_logistic_growth_worksheet.pdfIn PDF document text
    • http://tavarifa.epizy.com/duzawovagipurisejuluki.pdfIn PDF document text
    • http://bozusofofutuv.rf.gd/2006_dodge_ram_1500_service_manual.pdfIn PDF document text
    • http://xikepidefam.epizy.com/tulirebuxudi.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_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 4976 bytes
SHA-256: d47ab108339092416bd64c24bc7551e311a1d7a75056d2d3833410740fa6f4d4
font_01_sfnt_off00011c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 11140 bytes
SHA-256: b28966ad7668be50a1b593e7e7810060f40fb49d44cd5f857c4f63e1a39cc796