Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec49131a6731b808…

MALICIOUS

PDF

38.7 KB Created: 2020-08-25 20:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc45f9b055a7b5e197a447452917945d SHA-1: f0da8a791917176f233b60a47e19bf82533e1487 SHA-256: ec49131a6731b808a857d64680bed560a05da445a9ea11fe8a6cd225310d332f
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://ttraff.ru/pify?keyword=what+is+dynastream+innovations In PDF document text
    • http://files.soluschristuschurch.org/uploads/1/3/1/3/131380773/wuvodo_marosaname_jazix_ritajedivoda.pdfIn PDF document text
    • http://files.natemichaels.net/uploads/1/3/1/6/131606060/685b85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/93452701065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0200/1570/files/ireport_javabean_datasource_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8887/files/ala_baburao_dj_song_djking._in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/personality_meaning_and_nature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5094/3135/files/37030531042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/johnson_y_johnson_1998_aprendizaje_colaborativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/party_itinerary_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/73150905476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/96769199454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2553/1815/files/22103301606.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_off0000590c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 5208 bytes
SHA-256: 893c9ce8a93f4d74efdfb04cb0cc89545e4a4c4865b9ea321cd6e38e23cdcb40
font_01_sfnt_off00006a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 10468 bytes
SHA-256: 7e567e0513f27fb3b357ef250e0193a8730c915a8b539711c12664cc919cad5e