Malicious PDF — malware analysis report

Static analysis result for SHA-256 625156784e5a44e3…

MALICIOUS

PDF

36.9 KB Created: 2020-10-18 08:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e12f4a60d444c48644f19eb4d5bcf74d SHA-1: 720ef937b9f158f67ad69f89db660625d95e6da7 SHA-256: 625156784e5a44e3981ceb9ca2a1bf58c29caa878d459f43287e754d4d2a21e9
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://ggtraff.ru/123?keyword=good+times+menu+pdf In PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/kijobe-lokib-setumepux.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/loxalo.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/pifun-gavumuxer.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/papopagegop.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/pagukixutogolevur.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/1/0434/3870/2748/files/where_is_my_android_sdk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/what_is_proportion_in_art.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3589/7251/files/forrest_gump_hurricane_camille.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd01b8e-77e1-4766-846c-b6cfbc68b8c6/vupizikorusir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fda0af-6e9f-4b8b-9740-6ff78028c529/voxavilujir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/31499627834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/97110684721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0530/files/worlds_hardest_game_hacked_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a44bb59-6050-482f-b43d-21b9a4f80634/69055276969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a926f419-08be-48fa-9b8f-52862f8644e3/maburamesesabol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b580fb08-f265-471f-8f92-3e31bba3371a/tovebipire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c57ac26e-f614-4dc7-85c4-80b6658281e5/15298396515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fee3dd2-7382-4547-a37b-e825b04b1d52/lirubeketiwufaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02831ee6-9b2c-4d31-b303-f7569b0f956e/dizokobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9326358-fae1-416a-8355-173f1bc03739/446387963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a21e590-66bf-406a-8ee5-96028958e349/97216485368.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_off000053dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DD 4880 bytes
SHA-256: 876f4c227e6355a931f6d97af7a7b5fad1448c3fe87784c532d54fb291206af0
font_01_sfnt_off00006473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6473 10052 bytes
SHA-256: c45d383da9936dee0947bf9579a83999a7d4a3599523253e3ad394534f74a4df

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