Malicious PDF — malware analysis report

Static analysis result for SHA-256 817ff6ae195d3074…

MALICIOUS

PDF

54.7 KB Created: 2020-11-02 01:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: bb1def8172f64fac7255b0946f68e1ff SHA-1: 71d62ddaeffbc8108026f7c5ccf9bfdb79737476 SHA-256: 817ff6ae195d3074fe3f9d0b58d7fef6afd51a731e9bd7547c5b5588c12bc133
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://cctraff.ru/pify?keyword=local+white+pages+brooklyn+ny In PDF document text
    • https://s3.amazonaws.com/bugutaj/learning_english.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/fumazafemikixos.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/bihar_district_map.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/b3485477cfe1.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/2188696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8738c2f2943.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/an_occurrence_at_owl_creek_bridge_short_story.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/6219476.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/ace_gangster_unblocked_games_76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f93168cbbfff.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/moana_hour_of_code_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/9777835236.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000095dc.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000095dc.bin)
    • https://uploads.strikinglycdn.com/files/4377827b-9792-43b6-b785-67205d7010bc/kosumigibezuneridurim.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 extracted file (font_00_sfnt_off000095dc.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DC 5536 bytes
SHA-256: 4c7ad9275eed11979dd377513089ec15d205da80ccc54e2b0bcb86b6d1b8be49
font_01_sfnt_off0000a8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C2 10980 bytes
SHA-256: 8fa6e8814d9647e2186bacdcf02fc29a6d40d05709143edddce572cd391f7d4f