Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53c2b601bacc6ea…

MALICIOUS

PDF

77.0 KB Created: 2021-02-26 12:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d4c5da80652ae906447ba82735593a2b SHA-1: 132aadbd1415972c918c62ddd4f2b3c4008afaa0 SHA-256: d53c2b601bacc6ea46512ad0c4a42c5f9fbbb7c7bbb9b3113affa9b393a0c7c5
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 phishing or malware distribution attempt. The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm designed to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'mcgraw hill connect', likely a lure to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=how+to+sign+into+mcgraw+hill+connect PDF link annotation
    • http://xuxetosufuzo.getenjoyment.net/on_the_road_truck_simulator_console_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458856/normal_5fd390a7da432.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/xotoleguv-fekuxuzumifotat-wetud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416921/normal_60067d713164a.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/what_universal_remote_works_with_channel_master_dvr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_6031bc1c4453d.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/8153941.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/5e_monster_template_word.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_600ec2117a228.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/gJw2Owr/super_snake_truck_cost.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/2017875.pdfIn PDF document text
    • https://febadezupuwile.weebly.com/uploads/1/3/1/0/131071278/365d976a9ebd.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/rodiligarexo/4031968507.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/weather_report_of_delhi_in_august_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/6410808523.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/32045976728.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/25382326339.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/less_than_zero_full_movie_123.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_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 5264 bytes
SHA-256: 9044398a1717f573a25b6a80c316677676287b38cf179cee88707c406a2041ea
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 10704 bytes
SHA-256: dbf96add9564a8247aff97279e5e159cf452ae5a498dc510e0661158c47ed1f4

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