Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ad23c8816ad82c…

MALICIOUS

PDF

38.8 KB Created: 2020-11-02 21:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 051f64555c9c9836b0449a909583b795 SHA-1: b44c7c7495d2c8d312c6297148c7dfb3a53c5ff7 SHA-256: d2ad23c8816ad82c3e212adfbd978fccdeef6351763dda085040c835be95e7f6
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://gettraff.ru/aws?keyword=direct+examination+questions+for+policeman In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5f8f95271a8c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f96fbd38dd04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5f9f1d2dc0556.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/f771b569-053d-45ac-80c8-09adc2fad3ef/74478644587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8676e2ce-1273-43c3-bac4-d1707ab44615/27404548339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49653e81-673f-4b91-a677-820bb5a44973/tirixebeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102f362f-364a-4332-b172-9e7d265b839d/dragon_ball_z_majin_buu_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4050/5493/files/justice_after_the_holocaust_anticipation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456b024f-6573-4e5d-8212-20aba38096b7/ping_tom_memorial_park_mural.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9464/2340/files/kapilakadidaxigasolilipu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/34497293141.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/cerere_demisie_cu_preaviz_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/63813106166.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_off00005bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 5356 bytes
SHA-256: e1b239419e98163d87fe8c164f0e181ccd16145da637a0abfba32b90fe402e4e
font_01_sfnt_off00006e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E01 9416 bytes
SHA-256: 55dfe6694f717704da380758b52fb4e65656161b674bf109c25476c9e66976f2

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