Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f2b0ae21ac366f…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 05:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c072e64979ed74595b0134d8de333340 SHA-1: 9ae633370abfcb3157fa398023f0b4359daba8b9 SHA-256: 58f2b0ae21ac366fa35d7af5eec4e685cb5df631a0b3c343357449a618ab270e
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous external URLs, with one prominent URL suggesting a lure related to a literary query, likely to trick users into clicking. The presence of embedded URLs and the nature of the heuristics point towards a phishing campaign designed to redirect users to malicious content.

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://resalured.ru/award?keyword=what+is+the+meaning+of+star+crossed+lovers+in+romeo+and+juliet PDF link annotation
    • http://runolive.com/eso_orsinium_treasure_map00vwg.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/sumuxoj_wonulesowi_jiluxuvawepatop_jugemusalurix.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/2367257.pdfIn PDF document text
    • http://natlegend.space/dell_latitude_e6540_i7_weightnjpyc.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/jhb6iaU/zemafopikesuvelusizu.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/373ed48eef.pdfIn PDF document text
    • http://s-tochka.ru/vorikokokavaxijipaxijiek6qd.pdfIn PDF document text
    • https://mevimozow.weebly.com/uploads/1/3/0/7/130776561/gulekatorobibof_kovijim.pdfIn PDF document text
    • http://tb-films.ru/450446912955b0gj.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/femitubazobolemolibotorororn98.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/ENHkida/fun_facts_about_dogs_hearing.pdfIn PDF document text
    • https://sididipukiwe.weebly.com/uploads/1/3/1/3/131398020/jorubiru_vepawekaxakutiz.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/3heeIhd/space_simulator_apk_latest_version_download.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/fonazuzixagizir/free_2018_monthly_calendar_template_psd.pdfIn PDF document text
    • http://lifarodanudu.rf.gd/88302329673.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/every_praise_chords_piano.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_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5584 bytes
SHA-256: 42893b7882e606ec246eae4f17dbb4e078c822a9f465ef8bfc982b274f21f421
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 10492 bytes
SHA-256: fce795bb1e2528dc9a828f371041500511623fe34af834d3cce14069eb29d062

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