Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c02c02e0a0f4d29…

MALICIOUS

PDF

78.4 KB Created: 2021-03-19 22:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e7e58f8dc62c28c44200659a806ed247 SHA-1: 0560c06c4b9699a5109ddbc95a846c5637edf2e7 SHA-256: 8c02c02e0a0f4d2968d07cbaf71d2ed5d1576719f9b1f37829fc467105b7695d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://druttle.ru/award?keyword=health+and+physical+education+pdf+cbse', is likely part of a phishing or scam campaign designed to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://druttle.ru/award?keyword=health+and+physical+education+pdf+cbse PDF link annotation
    • https://cdn.sqhk.co/jalotenabo/pgcjgON/rhythm_city_18_september_2020_episode.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gjAjcUd/32390606813.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/GhijbnE/74270661549.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/gdihoal/gewak.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/cfmhfig/las_vegas_travel_guidelines_covid.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/h7hhMjj/rovepikiwisefimu.pdfIn PDF document text
    • http://keropuxopujeg.iblogger.org/schwinn_240_recumbent_bike_user_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_c2518560b6bc402d9be0a62219ed6df8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/599931c7-894a-4954-a724-6b6472ce79e2/92751316488.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/piscicultura_agricultura_familiar.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/43514831184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671aa10b-7887-4032-bad5-46e0d08f751e/64314928569.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_ddbff47a40eb449f9c83f830d5f0e551.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3990e2-9692-4bf0-91ef-4f41c1b405e9/how_do_you_reset_the_change_filter_light_on_a_kenmore_refrigerator.pdfIn PDF document text
    • http://mepusafufeja.rf.gd/widufaxiwesis.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/jusovuxuditalome.pdfIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_801c412ca6e940ebae7a9a04c40c1fbf.pdf?index=trueIn PDF document text
    • http://jesegusanasukan.epizy.com/twin_xl_platform_bed_base.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cfb7748-d6cd-41bf-8d1c-e9aa4cd1c8a3/michael_vey_the_prisoner_of_cell_25_series.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_13c576f185d7423489c528084b4711a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/5890734867.pdfIn PDF document text
    • http://nisinukodepafix.rf.gd/the_enteric_nervous_system_and_neurogastroenterology.pdfIn PDF document text
    • http://dikukezedigex.epizy.com/southwest_gas_holdings_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce467329-1be2-4ec1-b07c-ce81b087d233/artemis_fowl_cast_narrator.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_off0000f396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 5352 bytes
SHA-256: 30bc497597309bd7091c58d79c3257812f5b4614ebe835ee898cf5f9531dc443
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 11308 bytes
SHA-256: 404ab2a7d0c8d56dcbb4627ef361881096826a2ec55347fb0d26b6a8b95c5160