Malicious PDF — malware analysis report

Static analysis result for SHA-256 086e98f786a33d81…

MALICIOUS

PDF

64.9 KB Created: 2020-12-22 04:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c96f041bcb83190596f31b0a2128f565 SHA-1: 785c31595e3a259f5e3170b369b8c0db47bce2db SHA-256: 086e98f786a33d815220400c2e1e77545288ec45fe3910f5c8be62f22241fb74
226 Risk Score

Malware Insights

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

This PDF document contains a lure related to iPhone ringtone settings, which is a common tactic for phishing or malware distribution. It embeds numerous external links, forming a link farm, with one prominent URL pointing to a potential second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of malware or phishing content.

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffnew.ru/strik?utm_term=changing+ringtone+on+iphone+8+plus PDF link annotation
    • https://lixojubenolida.weebly.com/uploads/1/3/4/3/134375882/dd9b0026c3e001e.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/3c8d71e4a16.pdfIn PDF document text
    • https://pimakiwukusa.weebly.com/uploads/1/3/4/7/134712386/6b41bb699068b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_5fa7084f7d845.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/9192808.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/f57de5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e607144-65f2-4828-8134-4a98a4a8d2e3/purolezakokuwafora.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/whatsapp_for_windows_8_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/azur_lane_wiki_formidable.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0e107acac6192a87e946/1606290960997/cabotine_de_gres_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc579a50b6b03258f543eb3/t/5fcda10ccded405bb8f45e3c/1607311629017/44467824469.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/bourns_trimpot_datasheet.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_off0000c270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC270 5180 bytes
SHA-256: 4f5109273e56db45dca03d624501e1c5373653b4610e694236e801fd7ddb71f3
font_01_sfnt_off0000d400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 10248 bytes
SHA-256: 87a709e49a7af4b84ace9f2f31f3e9cbf9c8746536c87f4598aa246d394d44ff

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