Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13007588b62795b…

MALICIOUS

PDF

77.5 KB Created: 2021-02-16 10:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 748329ce1acd4e577fc3ae0651ed6459 SHA-1: 51022c1726b2dcce85b989cd0b031ff10f0c10e0 SHA-256: d13007588b62795bc9c70ac228ac22795d9cc2682f4108731dff00b027fb8c75
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious domains. The document body, though heavily obfuscated, contains text related to the lure 'what is the beautiful story of your life', aligning with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=what+is+the+beautiful+story+of+your+life PDF link annotation
    • http://romomikas.22web.org/kobumajaleso.pdfIn PDF document text
    • http://kesilub.iblogger.org/wowhead_enchanting_guide_classic.pdfIn PDF document text
    • http://goodsfor.life/105304551754psga.pdfIn PDF document text
    • http://fartook.online/passport_renewal_application_form_japan31coh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisunamubeso.epizy.com/digital_marketing_strategy_proposal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/how_do_i_know_if_my_baby_is_breastfeeding_enough.pdfIn PDF document text
    • http://gaxegumulot.rf.gd/html_templates_free_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/covestro_llc_annual_report.pdfIn PDF document text
    • http://punafifa.rf.gd/kubizub.pdfIn PDF document text
    • http://jegapedobip.epizy.com/jubixadek.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/samsung_j7_camera_effects.pdfIn PDF document text
    • http://wagupamodesugub.rf.gd/trachelas_tranquillus_information.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/wodepewu.pdfIn PDF document text
    • http://bukufam.epizy.com/69847834308.pdfIn PDF document text
    • http://mafonoxerinomif.epizy.com/50249691292.pdfIn PDF document text
    • http://lejemerane.epizy.com/87320096963.pdfIn PDF document text
    • http://wulixojapekapa.epizy.com/job_description_template_excel_free.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/54831951406.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_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 5112 bytes
SHA-256: 8ddd4c0838b60e7b275aa077ade79f3f92b2a2120b3c8592f6b045df1dc1050b
font_01_sfnt_off0001047c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 10688 bytes
SHA-256: b49186d628c7a62657bef203f15fbaa110650303a0bb440a7bc27bb6d0faadbd

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