Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2c6c41d9f6cf54…

MALICIOUS

PDF

77.9 KB Created: 2021-05-16 21:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e4d3ac852a7c69d886b21226c4146030 SHA-1: 2b0adb889052ecce1c20f352f809c6a0e98bc2f2 SHA-256: 2d2c6c41d9f6cf54ff5031e757a9a2e153255268e68c39c1a734944e69c5e42f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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://golowaki.ru/strik?utm_term=coping+with+visual+hallucinations PDF link annotation
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/5128782.pdfIn PDF document text
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/2f1b1443e.pdfIn PDF document text
    • https://vipapixamez.weebly.com/uploads/1/3/0/8/130814430/2997195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_606b328c00a17.pdfIn PDF document text
    • https://pivamaxisogen.weebly.com/uploads/1/3/4/4/134481881/zevew_mogekatugujuwow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426687/normal_6008b5614e77e.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/risisipajole/braggadocio_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/html_css_tutorial_ppt.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_d44999b1f6fa44ed9d56a230b7d6ec04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeponodij/sowavaguwonusuwi.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_589c61ad707a429c8d48abe51085b15a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/58374929609.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_2dfcc02b06ab403eb7f58ef4ea00f4ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vazisi/visual_studio_android_emulator_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/astronautics_the_physics_of_space_flight.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/fmea_summary_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/xinudavo.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/siwuxesolorefarutuxem.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/el_factor_fred_gratis.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_39e0ac39be5d4a08834de936ab2d4158.pdf?index=trueIn PDF document text
    • https://b1394492-4877-47b1-8bf2-e962974baa99.filesusr.com/ugd/3e4b7a_537b30b5cd094b3fa72a1a79f5a96a7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapexiw/best_android_tv_movie_apps_2019.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_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 5156 bytes
SHA-256: 50e76fe0b878addd6b85a77690ba5c30028157c255ad4f12903d686bb5c5e473
font_01_sfnt_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 10696 bytes
SHA-256: 19d2cfb1086840417d21ee58752ab455ed076ed7c6a884a34bf943f1a83beffe

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