Malicious PDF — malware analysis report

Static analysis result for SHA-256 be455156b2d0b9e6…

MALICIOUS

PDF

97.3 KB Created: 2021-03-23 14:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 845062b52c8a22ceb6e534985482cb62 SHA-1: edb1a72bdc446fd68ac4105984bad1cffed311dd SHA-256: be455156b2d0b9e68350e9ca3a919b28c52db87e58fade7529136b8602617ae8
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/123?utm_term=blackpink+du+du+song PDF link annotation
    • http://maturibcgj.space/lipokejadalozkoda.pdfIn PDF document text
    • https://bawufavipefal.weebly.com/uploads/1/3/0/7/130740211/05121a3ab6f2aa.pdfIn PDF document text
    • https://xufefizomuziz.weebly.com/uploads/1/3/5/3/135346589/xifimiv_bogejavev_labuk_fimerapunafo.pdfIn PDF document text
    • https://rewedotu.weebly.com/uploads/1/3/4/6/134664356/sagipig.pdfIn PDF document text
    • https://volasetabis.weebly.com/uploads/1/3/4/8/134879514/2117505.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/jikuxep.pdfIn PDF document text
    • http://com-signto2.xyz/329805681965vmqk.pdfIn PDF document text
    • http://stopnutristrike.ru/reporting_apple_id_scamsrxqpk.pdfIn PDF document text
    • https://mivifasev.weebly.com/uploads/1/3/1/4/131483453/kuwizikaparame_xadani_pususiwulisawe_penuru.pdfIn PDF document text
    • https://wedabivugexum.weebly.com/uploads/1/3/0/9/130968949/77b58a930a036.pdfIn PDF document text
    • http://sodaapp.club/fewiraxeyltx7.pdfIn PDF document text
    • https://wadoruzog.weebly.com/uploads/1/3/1/3/131379034/aeef4a.pdfIn PDF document text
    • http://energytik.net/51403268380ch3xw.pdfIn PDF document text
    • http://glasshookahcatering.com/43720763372ufytx.pdfIn PDF document text
    • http://themarkuzmusic.com/topelasarogamovafa4c9os.pdfIn PDF document text
    • https://tefitosuwit.weebly.com/uploads/1/3/4/4/134478986/4410290.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/gafexibofima.pdfIn PDF document text
    • https://sugopubix.weebly.com/uploads/1/3/1/6/131637077/e7bbfb6a1f7ceb1.pdfIn PDF document text
    • http://natorg.fun/englander_wood_stove_instructions4osep.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/gevavuzi_dozupoxoz_biwipokakazusom_vireka.pdfIn PDF document text
    • http://art-practice.org/nokup6430t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/texas_ems_jurisprudence_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/kenmore_washer_repair_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/jalonixoz.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_off0000f5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 25348 bytes
SHA-256: 2769ae61c5dbfa2a4a5eb096c442557af0cf1959a3cbbd642f27a2529fdea016
font_01_sfnt_off00013fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDB 5260 bytes
SHA-256: 25fc86c579d229e539e137fd4da71c1d3439012490947951c55ff5bd757a43c8
font_02_sfnt_off000151d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D4 11140 bytes
SHA-256: e41740090f42e54f0dd21e08cd344a9625ad3ada29bcce6f14810768a86265b1