Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea21359d5c02a336…

MALICIOUS

PDF

48.1 KB Created: 2020-11-09 15:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 7c65b8381c04e89440fd7f85ec5a1202 SHA-1: 6dc421e0ab19c9fdfc1a34bffd6f4c976a882bcf SHA-256: ea21359d5c02a33686c7ebf26eee29ef4a3af34217f1b7de7ea3219ace810ad7
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://traffine.ru/aws?keyword=investments+compared+worksheet+answers In PDF document text
    • https://fulugive.weebly.com/uploads/1/3/0/8/130874350/nigufipumaj_gagekado_biwel_fufufetizowuz.pdfIn PDF document text
    • https://lovunekigip.weebly.com/uploads/1/3/4/6/134685916/refuweda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5f979b709b1de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/punurum/9950115596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7d6869-a760-4bfa-b218-80778b9a117e/debozonibibage.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/training_consultants_series_24.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f649a4f2-a084-43d2-ae9d-63a0f4bf2535/54660747571.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/nominal_relative_clause.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/zojuxijezixotexanilopu.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/dokevaxegapudiwasixikoda.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/4044254984.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/genini.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/car_diesel_engine_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000711f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711F 5176 bytes
SHA-256: 47695ba718949bc50aa4fb8487ea5b3a3120e278547a273acbb7b322c269cf4c
font_01_sfnt_off00008291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8291 10184 bytes
SHA-256: d473248fdffef326840e1f8ddaac2fdee4819aeefcad92e9cb84a4a7e8b1a85f
font_02_sfnt_off0000a55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA55B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c