Malicious PDF — malware analysis report

Static analysis result for SHA-256 3618c1c76eccfdcc…

MALICIOUS

PDF

69.5 KB Created: 2020-08-16 21:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0ce5ad1b9310ae6b837bf9bcd82db2b3 SHA-1: 2761a3d439e446a0b9bf15ed6d80b79b70dc8f84 SHA-256: 3618c1c76eccfdcc6cc8b9555f30cc2d8a6179c86c142d75dbed9afc76190364
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.com/pify?keyword=dialogue+worksheets+for+middle+school In PDF document text
    • http://files.pinkrosebud.co.uk/uploads/1/3/1/0/131070762/jogobobebojekobozof.pdfIn PDF document text
    • http://dutaxana.christcommunityinternational.org/uploads/1/3/1/6/131637649/bomatemowisajo.pdfIn PDF document text
    • http://files.bornadventuregear.com/uploads/1/3/2/6/132682076/3056093.pdfIn PDF document text
    • http://files.renatalynn.com/uploads/1/3/2/3/132302855/xuziwubepulu.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/1/0429/0691/0876/files/revista_o_boticrio_ciclo_9_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/vunafuworow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/astm_a1061_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/kukajet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/muxigekotufobamosopejuvun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/federal_ethics_and_anti_corruption_commission_of_ethiopia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/toruvolekogokuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2111/5298/files/56423383296.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_off0000c8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D6 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 5592 bytes
SHA-256: 245c36091f245f2986a12f3b349846f95e89939b929ee7dba9f6266430adf25c
font_02_sfnt_off0000e5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C1 10384 bytes
SHA-256: 7a2cb725f96597c02bf92d37d0710d07ec63c2b582d3884bc403e1404caf0e6e