Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc89b1f9fc6920ec…

MALICIOUS

PDF

79.8 KB Created: 2021-02-27 05:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0d2d0e6e832439592a489acb135823ba SHA-1: 626efb6649445e014cf6a3cf5461558dc1e03df6 SHA-256: fc89b1f9fc6920ece75d641fac8cde060e150c639efe20f96850ab50a4051db7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or scamming by redirecting users to potentially harmful websites. No scripts were extracted, but the PDF structure and URL distribution are indicative of a malicious document.

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://maypoin.ru/123?utm_term=rm+101+universal+remote+codes PDF link annotation
    • http://kenugizi.getenjoyment.net/tom_apostol_analytic_number_theory.pdfIn PDF document text
    • http://j3vnci4.xyz/tufimoro2sogn.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/how_do_car_engines_work_youtube.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/creative_writing_prompts_for_5th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5fd12bccc2e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406473/normal_6038083d90684.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/fisokefabibuwalinonunonan.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/3071897.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/pupemesuxenarumas.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/148d8a54ad.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/faviwoxopupobid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff133287d365.pdfIn PDF document text
    • http://vuvuga.xyz/breast_cancer._csvhhoso.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/who_plays_the_prime_ministers_wife_in_season_3_of_the_crown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_600750852d335.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/357394.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/9405896.pdfIn PDF document text
    • http://suziterunedoloj.sportsontheweb.net/nigufagedutojilowuferenab.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/rutijiwamiziwe.pdfIn PDF document text
    • http://petersikdar.com/416877753461tu0q.pdfIn PDF document text
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/nujibiwinebowowej.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/what_is_moonlight_called.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 5348 bytes
SHA-256: c83f6dd83d0d33c6fdb2b6e9f2dfb96f28310e8ddfcaebeb38ac1e26506dcad5
font_01_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 10260 bytes
SHA-256: 93695fa4fde78af941620d6b7d8fbd27fa4ffb2acf9f84a6622ac0b68834e15f

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