Malicious PDF — malware analysis report

Static analysis result for SHA-256 999ca2b9faff1372…

MALICIOUS

PDF

105.6 KB Created: 2021-03-24 16:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e27b7ba4fd13917bd043e414eb6ae3b6 SHA-1: 23514d0959b99d049ee8b852ad7167f147dcd6a1 SHA-256: 999ca2b9faff13726fe1263abf9cc15bece4dd20fd1d69d6f4371a9ebb60abc5
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm used to distribute phishing content or malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=is+congress+the+most+powerful+branch+of+government PDF link annotation
    • http://item-mask.top/what_are_driving_restrictions_for_17_year_olds906vu.pdfIn PDF document text
    • http://zujoxuxosaja.getenjoyment.net/nidilemolufamesuzesof.pdfIn PDF document text
    • http://mufajaku.medianewsonline.com/7360202850.pdfIn PDF document text
    • http://naturwows.space/hpu_shimla_admit_card_20182m2np.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420939/normal_5ff94370efd15.pdfIn PDF document text
    • http://delayikapy.xyz/22017385400l9f85.pdfIn PDF document text
    • http://lovelyhouse.online/dork_diaries_10_full_bookmk5u6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_5ff4291a6999f.pdfIn PDF document text
    • http://afracheat4.xyz/859129337367tccz.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/nudaxexepuwuxokulelofuvis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_6056e9295e625.pdfIn PDF document text
    • http://mon-compte-cmb.best/warren_sharp_bookd491z.pdfIn PDF document text
    • http://kapusta.pro/pogalavuloxikozaluyyll2.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/lg_c9_max_refresh_rate.pdfIn PDF document text
    • http://topchambre.xyz/46854050460p40yt.pdfIn PDF document text
    • http://dobanojuwelog.22web.org/fujitsu_halcyon_error_code_94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/trade_show_lead_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/2001967697.pdfIn PDF document text
    • http://moretavumafoge.epizy.com/taco_bell_shredded_chicken_burrito_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/funeral_biography_sample.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/auto_body_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/job_interview_question_and_answer_sample_tagalog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15135 5492 bytes
SHA-256: 16def9d9fac057248089fb0844de6e3a7f33005f2fb96edc99df1e29f3e408f2
font_01_sfnt_off000163c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163C4 11400 bytes
SHA-256: 51010a98a7fae1200d174500318bd0acfefc622466cb1f5999e390bca9f92f72
font_02_sfnt_off00018a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A5B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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