Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebc287f6219d999…

MALICIOUS

PDF

168.2 KB Created: 2021-03-22 21:48:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d99b4275f53b646d83eff051758b6f8 SHA-1: 9f85d34c4f40b6bcd4cd11c56e25d98a564c5496 SHA-256: 8ebc287f6219d99953c60a4168a7b4866cdced08a030dd62f0fbd094f02b4444
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 0.9986

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://seumenha.ru/award?keyword=similar+triangles+practice+problems+pdf PDF link annotation
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/72c3a333537d03.pdfIn PDF document text
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/e98a02ca8d3602.pdfIn PDF document text
    • https://bovuxubirike.weebly.com/uploads/1/3/0/7/130738735/waladew-gezusoxi-dibutupale-vikowafex.pdfIn PDF document text
    • https://lidawutoroliv.weebly.com/uploads/1/3/1/8/131872032/6110040f291937.pdfIn PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/pelul.pdfIn PDF document text
    • https://fadirepux.weebly.com/uploads/1/3/1/4/131438814/wumitagoroke-vavirodozix-dozudijaxu.pdfIn PDF document text
    • https://sobugegebo.weebly.com/uploads/1/3/4/4/134489054/96ac100396.pdfIn PDF document text
    • https://defosojuregoko.weebly.com/uploads/1/3/1/3/131383900/f36f3756a6b44e.pdfIn PDF document text
    • http://m-laskin.ru/what_is_the_formula_to_find_the_total_sum_of_the_interior_angles_of_a_polygondlmx5.pdfIn PDF document text
    • https://pagurewitapusak.weebly.com/uploads/1/3/4/6/134632053/zukulo-koxalipavinovos.pdfIn PDF document text
    • http://bred-enligne.com/manual_testing_interview_questions_and_answers_free_download1ies5.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/614602.pdfIn PDF document text
    • http://umdtheatre.ru/zadivixitugijideuvfgr.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/3337544.pdfIn PDF document text
    • https://xuniruki.weebly.com/uploads/1/3/0/7/130739043/d1e970559f.pdfIn PDF document text
    • http://world-wildshop.com/fuxavex4vlks.pdfIn PDF document text
    • http://experiment.website/bliss_verb_formm8lxr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_4470016f1270443a805adaa4c578c22c.pdf?index=trueIn PDF document text
    • https://8b62b971-d575-4461-ae89-9de7a2afac08.filesusr.com/ugd/c5a911_e1abebe3ae5b4121af5c9bdf211be03c.pdf?index=trueIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_6eb8667819e84bb9bd0e09cad9d8dda7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/1gb_adventure_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/avery_30_labels_template_word.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_2233217da60246248be32290fc3ff0f3.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_off000257b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x257B8 5716 bytes
SHA-256: 8c3b19028d0505bb99494b9d6eb3240c19ae26575b27da8724161297a5391420
font_01_sfnt_off00026b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B0A 11672 bytes
SHA-256: c499966e6b4a4e2216e4b6ffba38a0745e0e9b00cc29b1eab9f8fefde5945b0c

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