Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc14c0123fd6078c…

MALICIOUS

PDF

80.7 KB Created: 2021-03-01 18:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 64198c74ef0fbe6cfec46c6d3eeae3c6 SHA-1: d5538eb95adf3e3f389e970b9d39740ce0d75e96 SHA-256: cc14c0123fd6078cfe5349378af3626f036baf22dccba89875fcae25795e1565
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically for credential phishing targeting Yahoo. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a phishing campaign. The primary lure appears to be a fake application download or information related to Yahoo services, designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/kotaxikaluro_terujofizip_lunasobus.pdf.
  • 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://bologen.ru/strik?utm_term=what+do+you+need+to+be+a+2nd+grade+teacher PDF link annotation
    • https://cdn.sqhk.co/bulixanejad/gfPs0je/disable_applocker_windows_10_gpo.pdfIn PDF document text
    • http://callup.today/how_to_use_petsafe_boundary_wire_break_locator2yuvr.pdfIn PDF document text
    • http://lnstagramoriginal.com/real_racing_3_hack_download_2019d2equ.pdfIn PDF document text
    • http://kudretbozaci.com/4541424628ug5us.pdfIn PDF document text
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/kotaxikaluro_terujofizip_lunasobus.pdfIn PDF document text
    • http://hookup673.site/wogapujunipujorugojid2rlou.pdfIn PDF document text
    • http://vemexulitoko.iblogger.org/yahoo_app_free_for_pc.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/datugapawikizazi.pdfIn PDF document text
    • http://freedate18.xyz/79705256318999af.pdfIn PDF document text
    • http://docita.fun/sogetiliwevamumajuremuwhxyu4.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/igrjjap/95511687669.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/poemas_de_homero_aridjist0wq9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magoravir.epizy.com/vishnu_sahasranamavali_download.pdfIn PDF document text
    • http://terezeso.epizy.com/nutritional_information_cupcake_with_buttercream_icing.pdfIn PDF document text
    • http://sojisij.epizy.com/rijejapujikipenewixu.pdfIn PDF document text
    • http://ponusiniwanus.epizy.com/5e_fighter_samurai_guide.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_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 5376 bytes
SHA-256: 9c6da5be68c47e26ac0b83406ecac990f4f9ad4d15daaf857f5d86cfbd071238
font_01_sfnt_off00011047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 11080 bytes
SHA-256: ae80fd208967f77f8eb449831ac4b549eacb3adf22422dee1eb66874058b1fea

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