Malicious PDF — malware analysis report

Static analysis result for SHA-256 347a22a692f4e331…

MALICIOUS

PDF

71.1 KB Created: 2021-03-08 10:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dc41cd38c0254b6ebb6e80d7d0eaaa51 SHA-1: ba2768509be251b01fe7e4330bfd556b5f0378b8 SHA-256: 347a22a692f4e3316ed428e8822941cf8422cf8ac9cfc7b4c185d1a1036c315b
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 0.9993

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 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://gimoguvi.ru/strik?utm_term=warhammer+end+times+vermintide+ps4+split+screen PDF link annotation
    • https://cdn.sqhk.co/nowavutu/ihYwGhf/fuvetupiduzijabapo.pdfIn PDF document text
    • http://the-job.ru/mobogenie_app_marketmolbz.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/ketujajopevebatosipimajefrlnp9.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/25485913222.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/lihicEI/64154491302.pdfIn PDF document text
    • http://kudretbozaci.com/compare_and_contrast_social_contract_theory_of_thomas_hobbes_and_john_lockevddvu.pdfIn PDF document text
    • http://verification-help.com/nutritional_information_fully_cooked_bacon43ynb.pdfIn PDF document text
    • http://remontvorot24.com/most_epic_dragon_names848uc.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/youth_football_playbook.pdfIn PDF document text
    • https://cdn.sqhk.co/nizidevogaka/g4Zjhhf/25125495477.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/folidumem.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/uthdPja/tornadoes_in_tennessee_yesterday.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/mCjcghi/gojunudafimosatewedekisa.pdfIn PDF document text
    • http://omerkatanalp.com/vitokubixizanuxadatovus6z.pdfIn PDF document text
    • http://voyazh-shina.com/peavey_vypyr_vip_2_loopkf11i.pdfIn PDF document text
    • http://vashastrahovka24.ru/gevojajijisu3tuev.pdfIn PDF document text
    • http://trokot-newshop.online/49322275569l8w4s.pdfIn PDF document text
    • http://habercigo.com/are_electric_body_fat_scales_accurate2y1rz.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/takateg/bibexakakirezopexifan.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/tujesosewunagifalob.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/d_d_volo_s_guide_to_monsters.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/timestamp_6_with_local_time_zone_format.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/tapir_facts_and_information.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_off0000d79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79E 5472 bytes
SHA-256: 7c0a2fa5d2e4f2c9cb7a07ba3cfdc83429732ba69533b6ce442096ec99c9439b
font_01_sfnt_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 10596 bytes
SHA-256: e5575acc0c9477eb2bf6280bd62b92414185118b214d0e608194332cb5bf21ac

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