Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc64b66f0b9fccf…

MALICIOUS

PDF

43.3 KB Created: 2020-10-05 17:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 67b8b5f15e0fdb60932526fff073dc70 SHA-1: ad8364eac129e62e86de716cb6b05507c8236323 SHA-256: 3fc64b66f0b9fccfca90a6600458e6bd272a0cf6c8b3e98657728a04eb7cc3ad
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/strik?keyword=bullet+for+my+valentine+discografia++mega In PDF document text
    • http://xudijap.designersink.us/uploads/1/3/0/7/130775639/kibewajunopo.pdfIn PDF document text
    • http://fejexa.stevemsherman.com/uploads/1/3/1/3/131398525/zufuzug_binasoniko_tozak.pdfIn PDF document text
    • http://files.janetdesautels.com/uploads/1/3/1/3/131379530/4e38c.pdfIn PDF document text
    • http://files.whenyousuckatrunning.com/uploads/1/3/1/8/131856212/6343380.pdfIn PDF document text
    • http://files.annadeacosta.com/uploads/1/3/0/8/130814342/51a707e1eae0b3.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/29a4e52a-91e0-4de9-8065-7a8e34611086/pedepuvodax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdec1a78-5810-4d32-abca-13e4307e1b66/bivafekojirusumel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d308fc05-8eed-43cf-bbe7-67128136c0d4/74756507490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4705cb-6449-4418-94fb-87d19c38de73/70442263023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca719ecb-dbed-428e-9483-2b8e13bccd1f/mebukokadaribevatixaruwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0491d9b-94e2-442b-a4d1-381b42d809a4/53557321619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9301d3c-227f-4a08-94de-1515efa4882b/60226730776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8095a1b4-a71f-4001-9ab6-332b9aee7363/44446026668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fe6d4d-db97-4580-ab8e-78543bcf0480/74911126468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5acc917-bcd0-4393-b0ee-2900a6d264a4/11122048796.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_off0000601e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 5552 bytes
SHA-256: 3474022975ceb3fc6debb1b43366d4e171d0a4e25654991d1d6f1a5109243cc1
font_01_sfnt_off00007300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7300 14672 bytes
SHA-256: e262d61f6bad1949d71f862bb1074390b8ac23814cb365b10ebf36d85c704e82

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