Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3adb7024098fce…

MALICIOUS

PDF

48.8 KB Created: 2020-11-03 14:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 918fa56074f296707e81caf1865a4413 SHA-1: 6cae8419faf4a1965575d9723e59c5c3d8ea80d5 SHA-256: db3adb7024098fce227baef93f8567843a47362c9cdd4df58ae9a77092bfe0d3
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=clash+royale+cheat+codes+for+android In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/tiwezoda_letagusarifofeg_difotunujaduni_nazakotilimena.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/7067452.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://uploads.strikinglycdn.com/files/4ef7dc52-3cdc-44c9-bc8f-98e47c6ded72/meslek_etii_dersi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25268866-65f8-45e7-aecd-c1de660578fb/sezozadeb.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/sultans_of_swing_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a78a79b-2afa-4631-9e01-f067a5c8804f/paracord_charms_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cada2e4-d3c8-48b3-8a69-0a2be26c20fa/72560295113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a61c7e4-aa94-4011-a2af-b5729205c474/jesejexa.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/53750956318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bb499c-6358-4cbc-94d2-28417cdf9710/85408640103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf96a640-fb6d-441f-bc57-c74b08a4f71a/45566610537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b588fe60-dc86-4ef6-8810-3a90d358caad/7835084142.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/moral_stories_in_telugu.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_off00007108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 5020 bytes
SHA-256: 397aded44db5edf4fc4b809c23d3ec921f79f36594c457eff3a50bb2d5e40d18
font_01_sfnt_off00008217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8217 11320 bytes
SHA-256: a30500160b8608938bba477a06d7a5c37509a84c3711cc3e3a5f1cbe8331f549
font_02_sfnt_off0000a827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA827 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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