Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a674507a761cfc…

MALICIOUS

PDF

101.8 KB Created: 2021-03-21 10:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 447a147bd11e8160141a7b42a5a7b5ec SHA-1: 171dd5483316c52da44380eef29d3d6889654d47 SHA-256: 93a674507a761cfc55a527799ad504b0165f4bbc2a5670d86263730db8d68ea2
252 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The file contains a large number of embedded URLs, suggesting it functions as a link farm designed to direct users to potentially harmful sites. While no scripts were extracted, the presence of numerous external links and the ClamAV detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://dafemum.ru/strik?utm_term=how+to+visit+mount+fuji+on+your+own In PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/085ff9.pdfIn PDF document text
    • https://molapoji.weebly.com/uploads/1/3/4/0/134096941/4037322.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/27f7b6693f4.pdfIn PDF document text
    • http://kyrgyztours.com/favilagiroawq.pdfIn PDF document text
    • http://leon-stavki.info/83376168734a889l.pdfIn PDF document text
    • https://nosobafib.weebly.com/uploads/1/3/1/4/131438228/5aa840b2951e16e.pdfIn PDF document text
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/razaza.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/tugaradasigu-jafewagi.pdfIn PDF document text
    • http://uscreditreport.info/how_to_fix_pressure_washer_pumpwq3s3.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/materi_akuntansi_keuangan_lanjutan_1krztd.pdfIn PDF document text
    • http://flowerport.shop/india_vs_china_breaking_news_in_hindilox45.pdfIn PDF document text
    • http://levantemosaic.com/992886192102xte2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_f71d7ea17a374571999ebbb9430454b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/bazaar_full_movie_in_hd_300mb.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_ebd50d03de2b4d44b18d1924b7e2b5a3.pdf?index=trueIn PDF document text
    • https://78f5967e-1348-44d0-b43d-4fba71d4c3e7.filesusr.com/ugd/a94f6a_d66ecb52d1364ac89e795852106815a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/nonalufigisakipu.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/calorimetry_problems_1_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/myidentity_platform_athenahealth._com.pdfIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_6fa27337cbf843abb414517d06b6e2a4.pdf?index=trueIn 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_off00013397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13397 9084 bytes
SHA-256: b43a63c9f4948796f996427d825a572933b324cce53171b315f104481fe9eae8
font_01_sfnt_off00015179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15179 4964 bytes
SHA-256: 6d90334772d17a6497476a8e81142b27c82711c185967c12bf956bfad055a593
font_02_sfnt_off00016263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16263 11644 bytes
SHA-256: 74be39522d783bbdec4823f2f8d01a8be4ac09792c3107d2512837b9c66301f5