Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db05f1b0e23b1f6…

MALICIOUS

PDF

43.4 KB Created: 2020-10-02 10:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d528036d70d32431a18abecff5d71240 SHA-1: e5a5fe99236271f4512068e9ba038ecd3f72a7b6 SHA-256: 8db05f1b0e23b1f6a8695d67aec4ffd0985c47c65d30e93948b6da5880806fcc
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.link/pify?keyword=q%253Dn+delta+h+calculator In PDF document text
    • https://site-1037088.mozfiles.com/files/1037088/ranuwujaxijetejezogazabo.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/wemasumedilefeditewosile.pdfIn PDF document text
    • https://site-1039720.mozfiles.com/files/1039720/68730945394.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/juderod.pdfIn PDF document text
    • https://site-1039666.mozfiles.com/files/1039666/89987027093.pdfIn PDF document text
    • http://files.saramapellibeequeen.com/uploads/1/3/0/9/130969440/8221695.pdfIn PDF document text
    • http://files.wmcfp.com/uploads/1/3/0/8/130814868/9245040.pdfIn PDF document text
    • http://files.denaliarts-glassstudio.com/uploads/1/3/1/8/131856012/fakaniputepezu.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/1/0436/6876/6873/files/vocabulary_workshop_level_b_answer_key_unit_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7713/0658/files/cisco_cli_commands_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6257/2696/files/invoices_have_been_sent_paparazzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/racially_ambiguous_celebrities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4209/8337/files/wasekemafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/graph_1_x_domain_and_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4786/4478/files/super_dancer_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/samophlange_manual_cover_vanilla.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_off000061d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 4956 bytes
SHA-256: eaa47218dc2274bcd74467812beab50cb56b44d984b8b2b4d859023e2d56cb8a
font_01_sfnt_off000072a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A4 15028 bytes
SHA-256: cae6dcfe35e423b30cf263b659f6e779d6ff2c61c2d597ad672e0a2b3510838b

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