Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d2d609f30f5cbc…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 07:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: acafd4a232d51cf3f750012905982c2b SHA-1: 241215a2cd517e1f307fd24220f10a9b64ffa39c SHA-256: 14d2d609f30f5cbc2ec4da863b21f197e6d9d7e12691f4c9ad7f59592ce7ee3c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It functions as a link farm, containing numerous external URLs that likely lead to further malicious content or phishing sites. The presence of many external links, some hosted on disposable domains, strongly suggests a deceptive purpose, potentially for SEO manipulation or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://bologen.ru/award?keyword=encyclopedia+americana+volume+2+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464873/normal_5fcdea3c6d848.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/S8ZgeOv/pucketanje_u_usima_pritisak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_6048ec392c288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_602a5a46d0908.pdfIn PDF document text
    • https://felonuwonab.weebly.com/uploads/1/3/0/8/130814100/wixubepuv.pdfIn PDF document text
    • https://wadamosemexijep.weebly.com/uploads/1/3/4/4/134434227/berorigovukaki.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/gdliih5/joe_roberts_construction_consulting_services_ltd.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/gd4hfCR/52841014296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389384/normal_5ff65e1c1cdbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_601c7b60c7355.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/ghgj7LD/75806975863.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/239014ed3f.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/I9MygfG/infinity_sign_on_keyboard_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_d1a3cc504a004299b37c6a2a989bc633.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_2a2f52737cd7451b8498e166c7335ab5.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_99fde721b0444d95af37fe1aee069d75.pdf?index=trueIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_c06bafd9591147fc916ac553b0508853.pdf?index=trueIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_68b4e863b2a04e1bbc1d81ce502e5176.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_9e05a1f49d8746dc9a895318a25ecb11.pdf?index=trueIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_3fd629cefe2c4053b19e1b422c5dbe77.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_0b3a16b235734e1e8368d323a9b350de.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_c57374d400d24c949af39bf24f32ff2c.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_c343273381404e30b94b62f34ad475cf.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_2b6a8366d78a4fd2a3549c32ccffbb64.pdf?index=trueIn 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_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 5372 bytes
SHA-256: b69533efe8e021abb1cfb43428c3b4afc4a4c15f5d8c301e79bd187e6848cd97
font_01_sfnt_off00010f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F25 11636 bytes
SHA-256: 4799e3addb21f467fa64b87e2a6029e859e73f2423d0ceb037de1598647eca53

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