Malicious PDF — malware analysis report

Static analysis result for SHA-256 90efb518c1ba1bb6…

MALICIOUS

PDF

89.6 KB Created: 2021-03-17 18:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04d8037fdac90a7aa718b51c1bcaf598 SHA-1: 90df05d84c552b7760532d687b9412b5851f1ad6 SHA-256: 90efb518c1ba1bb694fe71668ce29bf16f76e3f6a2e2f5620ce53b0522f220d6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are generated SEO-style links pointing to other PDFs, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://dugedepap.ru/award?keyword=autogenes+training+kinder+anleitung+pdf' is likely part of the lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://dugedepap.ru/award?keyword=autogenes+training+kinder+anleitung+pdf PDF link annotation
    • https://cdn.sqhk.co/jemajujo/hgggUd6/52488068611.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/9i9ieih/the_white_queen_series_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/fihgd9s/business_plan_free_business_ideas_free_download.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
    • http://pujasozitibuzi.epizy.com/93036663916.pdfIn PDF document text
    • http://wafovekideg.rf.gd/resumen_del_aparato_respiratorio.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/chinese_link_level_1_part_1_workbook.pdfIn PDF document text
    • http://bawujirilo.epizy.com/selegunewelekamab.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/photoshop_cs5_full_crack.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_75580f12806140e6874d709b07f5409b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loneminovu/free_visiting_card_templates_psd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f22ae2-95d7-40b9-895a-ad34d7e7780d/mainstays_bathroom_space_saver_assembly_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08b7409-3069-4a15-9187-919218e5a673/the_longest_essay_in_the_world_to_copy_and_paste.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_61c20e050fb6455eb671935440de0496.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/conditional_formatting_in_google_sheets_for_dates.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/25113688402.pdfIn PDF document text
    • http://raronamivado.epizy.com/pibesezojipe.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/what_was_hamlet_inspired_by.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/nedasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813beb55-40f7-47fd-ad8e-44ec62291c3a/roselitadadavewanerabubeb.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/holkar_cricket_stadium_indore_pitch_report_today.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 5144 bytes
SHA-256: c308053a06f66ddcbcb8d9fdb711d1c3d3d485738f3b01df1236698a960c6f11
font_01_sfnt_off00011b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B61 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000123ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EF 11348 bytes
SHA-256: b1aa8513d411b6bdaa542542fa920e55cced0fb10992cfd224d48a272e2dbd82
font_03_sfnt_off000148ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148EE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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