Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08e15ce5a7c63c8…

MALICIOUS

PDF

86.3 KB Created: 2021-03-27 14:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 46944ba3d5039bd253c72f218bdc6154 SHA-1: 53007d1943fb9d4bee977f0fd4cf791de4aebdbf SHA-256: a08e15ce5a7c63c874cf7c1fe87f9839f5d6dd986d27d2e235dac920ecbb0c60
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 pointing to disposable hosting, suggesting it's part of a link farm designed to distribute malware or conduct phishing. The primary malicious URL identified is https://mezovuduw.ru/award?keyword=automatic+door+opening+using+pir+sensor+pdf.

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://mezovuduw.ru/award?keyword=automatic+door+opening+using+pir+sensor+pdf PDF link annotation
    • http://taforojujutusig.mygamesonline.org/82702677145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404975/normal_604aadeb932ef.pdfIn PDF document text
    • http://situbune.iblogger.org/31402731660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5fe66e1a64927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6014809d55b7c.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/speaking_lessons_for_advanced_esl_students.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_6043fbfc84c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494452/normal_603d03543d49d.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
    • https://38c64f87-0506-4925-a3a1-425743e24937.filesusr.com/ugd/386d45_df2d25b87e0c43268283a691b102d546.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79e9714-5d03-4346-880e-e5ae2d2bde40/research_journal_of_philosophy_and_social_science.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_0d8f71e36d154fd3a400911514c69e29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba1b0eb-9a3d-4c87-b1a5-4e3524fcc67f/john_deere_lawn_tractor_maintenance_videos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8af36f-a500-40a4-b533-11baf6016d57/zomivilawaragarub.pdfIn PDF document text
    • http://jusakurufawotol.rf.gd/napaxobon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e50912c-dc48-4d9b-954c-38d6bc067745/bujusukavupixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d679c7e7-4a3d-400c-a644-d33160d59706/boston_market_menu_prices_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c3ce47a-59b6-4e06-a26d-2dcdd8518bb4/98129751953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef5a4eb-e115-4a14-835b-57ca21c17788/40909081548.pdfIn PDF document text
    • http://jukasuxoseki.atwebpages.com/deep_learning_download.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_9b06ac6e87fa4d05bedc596342c87eef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4b64fe-433d-44d1-9521-60f5308fe85b/la_trampa_de_satanas_john_bevere_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f67631-1023-407c-ac21-103f8b5ee7ef/samsung_galaxy_s9_straight_talk_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25769a17-598c-4fc5-a6e6-f682252977bb/behringer_xenyx_1002b_mixer_dimensions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 5316 bytes
SHA-256: 0be5572ec4d8cbdaaa1883c91a9116a1513b31a063c454bd2728e8b5d4f073e8
font_01_sfnt_off000112e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E8 12444 bytes
SHA-256: 3e994eea0f4460583e7187da6882cf18330f68231b2eb6babcf7d4589516f9cc
font_02_sfnt_off00013d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D54 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c