Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2558ca03e6085b…

MALICIOUS

PDF

78.5 KB Created: 2021-03-20 17:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6f0f33090f412308625725e07c2e4176 SHA-1: 11cde80f0b7d6d71737c033a1e901be39699732c SHA-256: 5b2558ca03e6085bf325654faa4365d6e3ea5f44b44f245c11594a91186c8fa3
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 0.9998

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://bologen.ru/123?utm_term=keyboard+keylogger+android PDF link annotation
    • https://jujowaganul.weebly.com/uploads/1/3/0/8/130874338/60c73375b3bcf.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/sulukazonej_ruwajelelalij_jidojizi.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/8jgeCjV/gebowupo.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/kudiwar_tejufulikomuwuj_biwosuwogese.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/diegf0u/tegovuxewe.pdfIn PDF document text
    • https://nivejuva.weebly.com/uploads/1/3/4/7/134713874/zilagusanisurivot.pdfIn PDF document text
    • http://meriline.store/32537947621o4t2c.pdfIn PDF document text
    • http://herss.space/moto_g_power_wireless_chargingkmz58.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/lOWUvNN/agenda_template_google_slides.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/wajub.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
    • http://vobogiv.rf.gd/vawenevekiwiti.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/non_verbal_reasoning_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/yangon_hotel_guide.pdfIn PDF document text
    • http://lodusebivepakef.epizy.com/villager_trading_guide_minecraft.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_f32d9dd6a99c42739013ff74cc4c343d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/15801835978.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/swarna_akarshana_bhairava_images.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_a62b77e1195a4de184e2a37c89d1d952.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mijumomub/allan_kardec_o_livro_dos_espiritos.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 4796 bytes
SHA-256: 41e273dc07eb6af82636706d0aaa642678bd9e1f5ca363474ce375cac9bc9e54
font_01_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 15800 bytes
SHA-256: 044457463ab91b34a244f023594833e355fb696d570a332faadd32f15682f5ef
font_02_sfnt_off00011e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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