Malicious PDF — malware analysis report

Static analysis result for SHA-256 94184f27e43ed0fc…

MALICIOUS

PDF

68.7 KB Created: 2020-11-26 08:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 687a3911066979ae1a26f50bbc5f9876 SHA-1: a6b7fbb70e785e8a9e9c139355f76ee65603e8e5 SHA-256: 94184f27e43ed0fc5ea51ec65089ab515cc9e05cf8b2292f2d538e8f11190d2b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=magnitude+and+phase+of+fourier+transform+matlab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f94034f3787d.pdfIn PDF document text
    • https://pepigapipewoma.weebly.com/uploads/1/3/4/0/134000130/pafoxo.pdfIn PDF document text
    • https://niwewuvikade.weebly.com/uploads/1/3/4/6/134629185/7909489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f87fd1117cc1.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/a761a7ea-b464-4cc9-8099-f721e7f2d96c/gebivufuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/32288753476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecfddd7-c6bd-49a0-bb5a-56fc53713df8/39942850334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689b4f4f-7eb3-4f5a-adab-e9644af4d3a2/lol_rp_hilesi_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/ingrid_b_lacy_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b9e8e67-80a7-4bfe-a8ea-0b718c13e155/94079027051.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/shoppers_world_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62c3934-1e60-46b5-b895-0bb7be8bf6b2/putibadojevulogegowekugif.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/27914346381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd97456e-c300-47c1-8e15-c7102f8721aa/kewuragebopiwofage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ebba6cb-8604-4e4f-8dc7-4d090f1a88ad/zajutojori.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_off0000cb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB07 5600 bytes
SHA-256: 31b116ec21e6a6e83dd99dec93b3f6c9762ccfee19563e440d98a492c3f63402
font_01_sfnt_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 11640 bytes
SHA-256: 919d1ee799725b725cda6464fef9a50d7c50f87781d5f7438936490f2fb934a1

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