Malicious PDF — malware analysis report

Static analysis result for SHA-256 10779e5bda8ed0b2…

MALICIOUS

PDF

59.2 KB Created: 2020-10-16 14:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ad4494ce54b8bf432636e47795b7f414 SHA-1: 74c06e3bf55baa1447228f9b3ae155181fedbdbe SHA-256: 10779e5bda8ed0b239c7cdbdf778cce9f8f44681aee09c717f968b7b3ce334d3
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=vicarious+learning+theory+pdf In PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/japufarolamefezaki.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/8358579.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/pejepowuxiv.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/gewogudanibow.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/jilakimagib-nenosi-bofuzinawi-kiwodifizuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f873bf95ab4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f8907e4287a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f891c611194d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f873a6d57c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f8938f08dee9.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/285dd43d-8e81-461b-8113-830e63cde59e/1850297721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3f0dc6-3683-4c08-8d5a-2741faf6feb7/14740018665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8709619-a4b1-44ab-9677-9217742c898d/30020893080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de377a76-c2b4-4f9d-965c-f8aa094f5988/63481647998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/lasexizodoziv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8647/1858/files/samsung_tablet_model_sm-t350_case.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3325/9943/files/joker_full_movie_online_google_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/winanomekuruxujibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4025/1285/files/ps2_iso_emulator_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/backyard_discovery_swing_set_recall.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_off0000a9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DA 5484 bytes
SHA-256: badc9cec0a637ccd6a022ad27de05c0e2ecb5c76115a9814badc7e161bc4cede
font_01_sfnt_off0000bc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7C 10180 bytes
SHA-256: 2432ddfaaa092ba61a649f9610ca919f83209318bd17cc5cb3c6b78736921766

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