Malicious PDF — malware analysis report

Static analysis result for SHA-256 747e69c7ff362d11…

MALICIOUS

PDF

76.5 KB Created: 2021-05-30 08:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c4e6e2745e4f1ceb3bfdddb4a36557d6 SHA-1: 9016cb8d7a664ceabb4915724fb91fe99c20e84e SHA-256: 747e69c7ff362d11719937e81fbd05c01442dbe65879ebc15a71aab5e7d1b0a5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=beyblade+burst+rivals+mod+apk+%2528unlimited+money+and+gems+2020%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485699/normal_601a48cec4008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_604af7cfb2e5b.pdfIn PDF document text
    • https://zopavuro.weebly.com/uploads/1/3/4/5/134584556/3690233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481847/normal_60191f5770f7f.pdfIn PDF document text
    • https://xalofaba.weebly.com/uploads/1/3/5/3/135339869/pitudaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418180/normal_5fd035cf2351c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_604828492ee10.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/gefuvupu.pdfIn PDF document text
    • https://bevarolemi.weebly.com/uploads/1/3/4/6/134685224/zikixiw.pdfIn PDF document text
    • https://zudimawavisutet.weebly.com/uploads/1/3/1/6/131606198/dfa000964c89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_6000f60698e52.pdfIn PDF document text
    • https://fosezuwupilure.weebly.com/uploads/1/3/4/1/134132817/jibutiporoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_5fd0eb6da939f.pdfIn PDF document text
    • https://bovagisobupuzod.weebly.com/uploads/1/3/1/0/131070774/8520509.pdfIn PDF document text
    • https://mufobaxepomek.weebly.com/uploads/1/3/4/8/134866816/dazakog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_6004c284198be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5fcf10d128df9.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/8d1e5681-e878-4981-bf40-d335729e0da7/73953753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1538367d-e9e9-4956-bba4-ea7ad1242c1a/ingenieria_y_ciencia_de_los_materiales_metalicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/158485ae-f624-4af6-bb53-81a3355464f3/how_to_clean_delonghi_portable_air_conditioner_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d9d67a-f0ac-4373-ba91-126b4dcc8d3b/foluwejevinepebajaken.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_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 6124 bytes
SHA-256: 7fc2059b4d2b85ff63bce9504069794c7268fb1a268a6eab11037fa5478dfe64
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 11508 bytes
SHA-256: 7f2c29dbbf0cede34e4fbeb00ef87a322ff96111a929730207b81239ab5627fb

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