Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad6152139bc8d3e…

MALICIOUS

PDF

83.9 KB Created: 2021-03-23 12:51:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a1d2770d8a67e4289d6f6489cb20febf SHA-1: d764ec80f94c59933e4527663830e1179958bc89 SHA-256: 1ad6152139bc8d3e437317304b906438f1b87b34090a36829fa11c955382b960
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 0.9994

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://soxebez.ru/strik?utm_term=introduction+to+management+accounting+16th+edition+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403415/normal_5fca86dabfb44.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/98zNjgs/coreldraw_2018_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/KihicII/52989881774.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/how_much_does_a_nissan_service_cost.pdfIn PDF document text
    • http://borezopesane.22web.org/dapewavejegukugo.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/jdjzv2f/lofoxivavoleravenegeso.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/zamibujusow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fc9951d27ae1.pdfIn PDF document text
    • https://cdn.sqhk.co/vafexifere/KPiiLnp/xunovasemapite.pdfIn PDF document text
    • http://sikalaporaka.22web.org/sika_latex_r_bonding_agent_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/gdXpigA/funny_fart_gifs_with_sound.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/3670781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384050/normal_5fdd80489def4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwumuni.epizy.com/simple_tenancy_agreement_template.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/2823430416.pdfIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_eb886ffc963340168414864dd65bd8f8.pdf?index=trueIn PDF document text
    • http://kivekogifix.epizy.com/voguja.pdfIn PDF document text
    • http://girofili.myartsonline.com/dixonibeniwedo.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_b0d911ab710943d7b19c9bdffbe1ee41.pdf?index=trueIn PDF document text
    • http://xajumin.epizy.com/plugin_android_chrome_browser.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_73bdd8d53ed74011bc87db18640c97ea.pdf?index=trueIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_4b354dd5b785461ba0f3d0f0c76634c7.pdf?index=trueIn PDF document text
    • https://66f9544f-8325-470d-a543-c07714603334.filesusr.com/ugd/4b2642_fdfa4d88e66e40c1a22de6485d76eb36.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_off0001054f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 5556 bytes
SHA-256: ecba704b87eb5d32bd9c4bda52403c1b213a18a878f42c2c3945caea2980b343
font_01_sfnt_off0001181a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 12232 bytes
SHA-256: 076e5ef4bd94feb149b54f00dd6a2f0103d8a3410125e47b3936d128b5a5fdaf