Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d787121cad2dc24…

MALICIOUS

PDF

73.0 KB Created: 2020-11-25 05:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cd723172b0fb24305c4b180c8f4f1885 SHA-1: eabc84dee1101fc09e2f710492d1ceb2fa5de93d SHA-256: 2d787121cad2dc24fa43591a1c08b022dcbdb1378693e5fd8f9a43ba44b69be0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm or phishing campaign. The embedded URL and the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further corroborate its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=gangster+bengali+movie PDF link annotation
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/c9aceeb697fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_5fa0f35abcc5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8760d29196a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5fb2585a0c610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f87d92dd3f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fa5301bef36b.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/c242f28d3e3.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/3415180.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/bc2b1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/913f4e3c-2e1d-43f5-88a4-b6b4bdd24902/xowamuwazejiwobisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e386565-14f5-43bb-8b9d-4e024c50e9ee/2009_volvo_xc90_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb4ddc5-e12c-40fb-922d-18bd8ee5ab2c/seginonamiwebexun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56807c2f-a21b-4a86-bc43-a83503b0fc4c/sowenuzuwedenunowituver.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F6 5024 bytes
SHA-256: bde256beeec5959d25488156f9d3683b85084d1ca603e73e6ea6ff693671cf0f
font_01_sfnt_off0000d5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F4 4408 bytes
SHA-256: bc664c928eae7884585b42558dcde6d1b7c80858f1b5c50ee16ab00e645750be
font_02_sfnt_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 10728 bytes
SHA-256: 1d36edb21e94e8c44529e811c25aaf55b6665a26adc905653cecc14aeb4a0929
font_03_sfnt_off000108d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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