Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c56f9d40e6bb075…

MALICIOUS

PDF

86.5 KB Created: 2021-05-28 11:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 27fa9d91e5fa554cca84f19b6152e854 SHA-1: 30677395c85a360ffcc2ef4f8fb9f3c514c8e33b SHA-256: 8c56f9d40e6bb07512bb1371dc42ab5bb623b1ae3553200a5b1a0ca4d99e4a06
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit users by directing them to potentially harmful content, aligning with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=cats+1998+film PDF link annotation
    • https://pizupunaj.weebly.com/uploads/1/3/1/4/131406403/wasufomijod_julurumeja_wuxunikuga_koxoxorawemono.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/woxosen.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/bovepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_6063581b9709b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd1726a7f9ae.pdfIn PDF document text
    • https://mitexasax.weebly.com/uploads/1/3/1/8/131857270/4d75a6eed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_601aa7c60a436.pdfIn PDF document text
    • https://juzasofudabin.weebly.com/uploads/1/3/0/7/130775050/wararubunov.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/038a1bd4-4866-40f8-b01e-18fcccd75338/94250637596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c66b067-4312-4ce9-9d71-27f224258995/39358051163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c23ef72-e352-4422-9414-212cc60f0d1f/aeschylus_eumenides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc595d76-2206-402e-a7ff-df1586732b5d/mobaxoxutezivepuwuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2cab6b-c5f1-4322-912d-0eb591666987/nunivaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0870acd9-7ac1-48c7-bccf-8483d482a98b/8936594445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d75543-f733-4503-ba1e-1973af008777/how_do_i_port_my_number_to_att.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e0b9eb-5408-4587-aa55-62eb4d74ffa5/25808011897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc3fa61-893e-4238-a7e6-bee471fa40bf/varoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc3c7a1-be2a-4eb3-be4f-944a8dba8cdc/72685730823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0856d3d0-c9d7-4c5b-9666-e08092bb7b64/giraffes_cant_dance_music_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e166c8-679f-4d27-8b1a-61729984f0fb/dictionary_of_demons_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df97dc28-d6f4-4b3f-9f1d-ac76314136a4/86704524471.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_off0001139f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139F 5124 bytes
SHA-256: 88433a8983df7466714a2d40ed22e20bc5fe6b1b2ec61d97e5ab15998216dcb6
font_01_sfnt_off000124fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FE 11856 bytes
SHA-256: 4db8981b16177d8ad5d02ab562ac0854ce3f1ab4a09df59a0bf5e061ec52a845

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