Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea792cefe76377d8…

MALICIOUS

PDF

40.5 KB Created: 2020-10-09 03:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f3fe1a922dcb5c5a6457a508c2f17a68 SHA-1: f913baff2f1764ef5aea3d83415d793566f91418 SHA-256: ea792cefe76377d86b99cb125ad861c8cb6141641ed4caf35b80e6554acc5522
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.club/pify?keyword=dodge+ram+rumble+bee+2019 In PDF document text
    • http://files.sheperforms.com/uploads/1/3/1/4/131409309/poperavetawoditefep.pdfIn PDF document text
    • http://files.themgrantproject.com/uploads/1/3/0/7/130775129/jupivavuwamizuratavu.pdfIn PDF document text
    • http://files.tobaccofreewisconsin.org/uploads/1/3/1/6/131637881/mokokiredax.pdfIn PDF document text
    • http://files.samanthadetillio.com/uploads/1/3/1/3/131383242/motexaponumaz.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/e357a305-0ae2-42cf-b31f-c997a1056f21/96249142797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c51340-29e1-483f-b44f-d69c75a25664/48311508104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60df2859-a3a9-4176-be0f-8e985a5d5ed3/17393206298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0f2300-eae9-4b82-b45e-a2bd0f05ccd2/4244820129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1258/7159/files/plazma_burst_2_unblocked_games_007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5822/0187/files/gajakemajexawubotaxajujes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0070/8765/files/sasiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8489/2310/files/96319901544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/vulivisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/a_world_history_of_architecture_third_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/74122161645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5440/2202/files/i_dont_feel_no_ways_tired_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/7661/5065/files/jimepovajamifirofasik.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_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 5588 bytes
SHA-256: 4bdd24c155f29d5183ede6504e56a7c12f2188d16a3337f4303d00907d7163fc
font_01_sfnt_off000074ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 9532 bytes
SHA-256: a086164ed321d32645298fd3627c486f6688e650e91d77c4723aa94837612a08

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