Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d60ffae3d044908…

MALICIOUS

PDF

73.6 KB Created: 2021-03-14 01:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3f851fcef33c6519fe78c924248eb41f SHA-1: 2500252674cd4ab2b3071b09d8e6cfdea50de81e SHA-256: 0d60ffae3d04490888003997c87fe7c513d2fde9ea3052198b61a38810d99cb3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or a method to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://lozipotod.ru/123?utm_term=bahubali+2+tamil+movie+hd++2017 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5fd7dd7474780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_604664c695078.pdfIn PDF document text
    • https://zipufalazuviw.weebly.com/uploads/1/3/1/8/131856517/7573969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_6041f3e4327fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fd04b227150a.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/bugadewowalilogugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_602d6d868bc2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5feaf9d2dc49b.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakef/jiban.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/blade_sword_of_elysion_gameplay_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/somavotevodetekesarawaxop.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/6089712720.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/40707954746.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/score_sheet_music_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/world_human_development_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/mosozar.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/infinity_pool_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/sketchup_free_desktop_version.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/b._c._a_course_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/nutilepofusi.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
stream_004_off0000e7a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE7A6 3572 bytes
SHA-256: 90070aa8b1541289aec99dc46245176c630966a6fd61ba5cdeb3c7e332001a72
font_00_sfnt_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 5444 bytes
SHA-256: 3f04398e73cbda06057b7bd81c8d55755d92e0cf12e7d340e68f18ef26e85b50
font_02_sfnt_off0000f512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 10380 bytes
SHA-256: 3bacfe10e121b095cd6a574988fdecf2d86b62169e2d4371a20833d5fcf68d35

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