Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bca2fa9882b89e…

MALICIOUS

PDF

41.0 KB Created: 2020-10-31 07:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c2677bfd11e97d5c49c3d7a8c9f1add3 SHA-1: d48f04bf8031b28d1a03d214d143fe401c363dfa SHA-256: c4bca2fa9882b89eab0e384b8176fe8064b6604ea4ec5aa161f4941fcd4c0083
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.club/pify?keyword=greece+police+department+new+york In PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/begijof_puwefoluxib_rinutolij.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/1562713.pdfIn PDF document text
    • https://tiwovukixata.weebly.com/uploads/1/3/4/3/134314311/zuxafapipeganijeg.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/weveli.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/titezefevukoj-zabuku-lodukovamifekur.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/nulirapa_mufujo_mibemamufamezet_migafomoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/biboduxijidujetubune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/31149609494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/6334/5820/files/bobilulijedagok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4037/4428/files/newman_searle_general_properties_of_matter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/2020_phantom_forces_speed_script_pastebin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1221/2901/files/replication_transcription_and_translation_worksheet_answers.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_off000064a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 5332 bytes
SHA-256: 18c5013d07666bd1973e45447e78a12da23907b60543a13d085f34b5b3c3c83b
font_01_sfnt_off000076cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 9560 bytes
SHA-256: 6d0247f8e30e657896c7c5f78f0c93a9f539d668eca6ed097ec916e8ab6ab8d1

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