Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbb5a6599ca2dbd…

MALICIOUS

PDF

69.5 KB Created: 2020-12-18 08:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 14166bd9c2f956eacf55179f216558c2 SHA-1: 1a074b14c17fb8be1db6f43236bda22c50cb60ba SHA-256: 3cbb5a6599ca2dbd528e784c9b2a166fdeace7e55c1bdd7e029f2976c5d4c467
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a mass of external links, with the primary suspicious URL being 'https://trafficel.ru/123?utm_term=dnevni+horoskop+vodic+kroz+zvezde+krstarica', disguised as horoscope content. The presence of numerous external links suggests a link farm or a phishing attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafficel.ru/123?utm_term=dnevni+horoskop+vodic+kroz+zvezde+krstarica PDF link annotation
    • https://votuxujalesobe.weebly.com/uploads/1/3/4/6/134683371/09d10bfd355.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/wajij.pdfIn PDF document text
    • https://pewepexit.weebly.com/uploads/1/3/4/6/134659954/diwikes_gemenan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7bbd303f04e270fe68033/t/5fd1a2e2d97b572b89d6d84e/1607574243254/mario_kart_racing_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/jusanikadutusemudefoz.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/columbia_county_tax_commissioner_s_office.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bfce0e2-a598-46a6-9db9-9bb7b2accb6c/bony_fish_internal_diagram.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce749acdbdb5778b1a64b5/t/5fd14062e3865c7b6b7ce343/1607549027236/vinyl_flooring_installation_estimate.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65167084698658e833d4e/t/5fd6c61d102ca46975f2ace9/1607910942160/6402616651.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/zukitoravemisokozus.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/18189726324.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc18cb3e18c5c478e367657/1606519987935/exam_fm_study_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d9b61c8c741314318915/t/5fc7ec5d56f0cf066cd98045/1606937693731/cnbc_anchors_closing_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de782e6-75ac-4de4-9708-241e1241a568/format_surat_pindah_sekolah_mi.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_off0000cf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF07 5304 bytes
SHA-256: 8f846d85e5f250f3ae8964cdc31484434191de8dd4b20a26f67f17e826949e39
font_01_sfnt_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 12804 bytes
SHA-256: 1070174256f24bd3ce8e4dcaad7fa5786273566da6837038959342a0449699c4

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