Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1c695c064efc09…

MALICIOUS

PDF

48.4 KB Created: 2020-11-09 09:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 43f265435193fd5ddb59dc5442302dfd SHA-1: 27fec48f01c12e3558c9b4145001574b92848039 SHA-256: fe1c695c064efc094ce3a4814d68a862c252a8aa73b800fb33b333747502d0ca
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?keyword=physics+chapter+1+study+guide+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5f9a8c883ce88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5fa6375687a2d.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/9d696f90-d95e-450b-ba9c-cd2bd6df3b1a/9554310152.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/fapinaxifasowovinivu.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/32691161236.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/the_blue_zones_kitchen.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/bonugagorolelil.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/51051135661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0562661c-9a01-4356-81eb-e2fb24ee48b1/common_core_sheets_answer_key_dividing_whole_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acaf4035-746f-401a-b2a0-98be1f98747a/79107555610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8291e818-231c-4d89-8083-57847c5700d6/jamiloxofamiso.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gavabagovuvofafaniradurel.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_off00007d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D68 5548 bytes
SHA-256: 8d7769564366d0a564069ce3d511a31bd2baf1373ad31cdc42c3d846fe204eb9
font_01_sfnt_off0000905e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905E 10608 bytes
SHA-256: a07b278b482a088bbbb566eeafee4d788edf9db0ae288559203db67883e22ace