Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc64281b62486fa…

MALICIOUS

PDF

75.9 KB Created: 2021-02-12 18:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e9c6b6832a41e81ae5dfe55581c2ce2a SHA-1: 007fc1aa604dd3bbaa623dfb2fa7d7069f8a7292 SHA-256: ccc64281b62486fa811e0c712b00bb6d64c8a9f2530889887af6738af7c9b265
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URLs suggest a phishing or SEO manipulation campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=reglas+de+futbol+7 PDF link annotation
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/kumibifimadojuti.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/bifidomo-minodamuv-gugenubowasezob-sigox.pdfIn PDF document text
    • http://fabulouss.space/xavevixoriwonuvejv5tp.pdfIn PDF document text
    • http://dashcamtopbest.com/classified_narrative_format_balance_sheetbwiw5.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/a54694.pdfIn PDF document text
    • http://olx-delivery.cc/vertical_and_horizontal_analysisxf1xt.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/acfc2e82f9.pdfIn PDF document text
    • https://zoxopabetil.weebly.com/uploads/1/3/1/1/131163737/6c00db3a.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/3370541.pdfIn PDF document text
    • http://vpntop.info/639045713209wu9w.pdfIn PDF document text
    • https://rogosibaf.weebly.com/uploads/1/3/4/5/134590501/siderovamaxo.pdfIn PDF document text
    • https://bexopugizabon.weebly.com/uploads/1/3/4/0/134042324/ab8eb015822375.pdfIn PDF document text
    • https://xokiguju.weebly.com/uploads/1/3/4/6/134679394/a9a6df38.pdfIn PDF document text
    • http://prequester.online/460964142703lsdg.pdfIn PDF document text
    • https://wovegusokab.weebly.com/uploads/1/3/4/8/134850220/8455366.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/1393427.pdfIn PDF document text
    • http://frankiearvelo.com/hipotenusa_cateto_opuesto_y_cateto_adyacente_ejercicios3634a.pdfIn PDF document text
    • http://bogplaktnc.fun/budget_planner_template_free_ukkpevv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitaporuzi.rf.gd/js_format_2_decimal_places.pdfIn PDF document text
    • http://gavojomizam.epizy.com/aeroplane_jattan_de_song_djjohal.pdfIn PDF document text
    • http://zimeketoxera.epizy.com/2501546914.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_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5208 bytes
SHA-256: a38dfe4ecc1f98f977582baa2603bbb9b0d33bf78eac802772887b989d43709f
font_01_sfnt_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 11360 bytes
SHA-256: 564a7b61b63f800915bbfd3ff1809412bbb4d56b10c47edcc3e3edf2f6bc71e8

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