Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82ce480b681c890…

MALICIOUS

PDF

84.4 KB Created: 2020-11-11 18:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cb1b4d525d13dc0eb7e3e37bec6a0315 SHA-1: a84866195ec9c4ebcb225eaa42fc2da43ea1971c SHA-256: e82ce480b681c890bfe2a9ff011035bbcb71a1302baa673097e9bd96e3a6ab6f
194 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/wb?keyword=anchor%20html%20%20attribute In 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/450a260f-2e93-4d83-8d25-dad7e32fe982/91193232322.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/four_pillars_of_nhs_scholarship.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/virisanapamesofimuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73759f73-7980-4f02-a521-468451154b10/69584730662.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/pizewowejo.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/masifojakevumamusafulifus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f830e93d-bc2c-4808-958e-91d725a9697d/somalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79028de6-e997-4655-85ea-21478c179d0c/cortes_de_carne_de_res.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/school_franchise_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3cccc4-408f-4946-a407-8d138c1efa8b/tagatitufenulotarusez.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/17117022547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e5fe13-3dcb-4c9d-9fac-d84d4520d43b/kekugezusudazekadakigul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff8790e-1e8f-41e8-99d5-045cd303c3ad/xobujugiposi.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_off00010c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C25 4988 bytes
SHA-256: e7d36c1baab15a45129c90dc288cf0dabbb1cac5f48c3a983392a15f687a3fa0
font_01_sfnt_off00011cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF0 12008 bytes
SHA-256: b75a72bcfa783b738a76fd30f3261d4a6ac75d827f92b2f3aaa5adda1411d1f3