Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e16dd9b703f2a08…

MALICIOUS

PDF

74.5 KB Created: 2021-05-23 05:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d3f0ea50dec445a11f9f22b3cd738532 SHA-1: d5124f11cce6bc9706b4c8d485c15d3e5a419ebf SHA-256: 0e16dd9b703f2a082540ba987f838911e38349874c585780bd9ae44ae634c87d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution scheme, likely leveraging embedded JavaScript for malicious actions.

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://vilenefex.ru/strik?utm_term=samsung+frame+tv+remote+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5fd164b663b54.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/fesudupagadu.pdfIn PDF document text
    • https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/leduravilofegulop.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/5324909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_6054f970eedc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_5fd1bb9814d27.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/87ba42da-ddd3-44c9-bfbc-c173866382c0/scag_turf_tiger_2_service_engine_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3d9e28-e741-4e1f-ac9a-2c303d6e2263/zeludusepunedivakaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e0071e-94d4-4bdc-98bc-044f71618827/kebiwozololosagevud.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/27745595064.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/update_android_graphics_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/vexidafenonotoselusuv.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/rajorewufujedife.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/16324663803.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/cancer_de_colon_hereditario.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/no_hire_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4672c9-8af6-4450-b0af-629de1431044/how_to_start_your_romance_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b0f96e-30eb-4886-af22-21e1af1dcee2/digitech_jamman_solo_xt_looper_pedal_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb135854-6e58-48c0-908d-0ed23d2131ae/72155780454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3bac019-0465-4d3d-b9f4-4350e3423d6e/kalomijilagigepawat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5929a4c6-b604-477e-b2b1-e72d55d5bf80/37475456027.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_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 5360 bytes
SHA-256: c21ab73d6f4426c11c58676a7fa91fa48ba2b6bff183a32fdca9ce1d035ed6ab
font_01_sfnt_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 10976 bytes
SHA-256: 855201de84558661d2c9ff6a055a57114a5eefeed6b0c5fd289e3e1ea0f0579b

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