Malicious PDF — malware analysis report

Static analysis result for SHA-256 9080b7c13c8a3819…

MALICIOUS

PDF

73.4 KB Created: 2021-06-07 03:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7b8ed75f962f53daf6bae9b60365bba7 SHA-1: 20a10612e9e023a6e7c573a1cd13299ba30af529 SHA-256: 9080b7c13c8a381937ea0f50b03f5dedc11fc1b289da77d24e8099c3032cb120
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and lead to a redirector URL. The primary lure appears to be downloading cracked software, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://synerhu.ru/pbw?utm_term=download+corel+x7+full+crack+google+drive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4530429/normal_602f6db87ec8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382953/normal_602fc428f3607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_6023dbbdbb9f8.pdfIn PDF document text
    • https://jurutidi.weebly.com/uploads/1/3/5/3/135397820/2751223.pdfIn PDF document text
    • https://konoxike.weebly.com/uploads/1/3/4/4/134445870/8284596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408995/normal_5fffa8ab28c12.pdfIn PDF document text
    • https://vatuwogumim.weebly.com/uploads/1/3/4/6/134605764/nazugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_6011d6e9022e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fd6243156dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_602634c694c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_60559bee96161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408195/normal_5fc8d2446cad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_602656afe0f60.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/120b1fa4-5d59-4e42-a4c1-d1c1103327dc/keurig_k10_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aeacf4a-08a1-4185-b8aa-a619c8287f34/the_bulletproof_diet_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437346ea-e565-4163-a0d4-0fea77e49d8b/impuestos_acumulados_por_pagar_pasivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee25c06-3149-4349-b383-de762e0d5969/what_does_a_system_administrator_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ad5929-717f-4f06-8bbb-26f5792476ce/cryptography_and_network_security_by_william_stallings_7th_edition_2017_pearson_education_inc.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_off0000de43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE43 5376 bytes
SHA-256: 1154edc68d42ea5ccf05a7a05e4daba6b449363c26324e21ebf8ed7416d8515a
font_01_sfnt_off0000f0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CD 11096 bytes
SHA-256: d1ee88ab203aa8d3ebe086231afeeccc838bf8dd9de5edad0661d7a0cc59481b

Open this report in the interactive analyzer, or submit your own file for analysis.