Malicious PDF — malware analysis report

Static analysis result for SHA-256 7688477fde884266…

MALICIOUS

PDF

50.2 KB Created: 2020-10-26 02:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 43109f6a2ef77b8a2be5aae76ec5d879 SHA-1: 12fface4a5b334e841479e22618806085011e37c SHA-256: 7688477fde884266bb1dc180afe10549d4b5483e5a9fb9ec3bb068ab729e9a15
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://cctraff.ru/aws?keyword=jeppesen+airframe+textbook+pdf+free In PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/8ce4e6.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/losifen-vanenoxizoponev-webexulos-kirelutinu.pdfIn PDF document text
    • https://sivirezu.weebly.com/uploads/1/3/4/4/134445297/3010559.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://wenadexedodoren.weebly.com/uploads/1/3/4/3/134322255/3039029.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005a63.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005a63.bin)
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/end_of_year_report_comments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8122/0505/files/law_of_cosines_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/lowivunaweteta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/angel_investor_contract_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0391/8512/files/professional_english_in_use_cambridge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3144/4128/files/24799896692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/bamberg_self_guided_beer_tour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8028/0989/files/convertir_a_excel_gratis_sin_correo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9202/files/25682932043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7880/4160/files/simple_side_scroll_game_android.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/bobikifemudoza.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/jowowulugarizuletixorimar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22671b9d-1ec6-4666-a462-baca77c4c2e3/the_grapes_of_wrath_by_john_steinbeck_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b24d6d-ac89-46e9-8175-8ff6784b5a68/jevovegov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e4f94f-6615-4905-91ea-58549764e0d0/tezejemebigopevova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2f0b3f-0e3b-4230-ad1a-230145e26803/pelofakokagitiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4455be50-6bea-4a54-9e82-238510fe6e32/godudawoposuwodubuwiwat.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://dejavu.sourceforge.netIn extracted file (stream_005_off00009085.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_005_off00009085.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00005a63.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009085.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9085 23492 bytes
SHA-256: e91c408c24fe033d89c658331fd4665c0a0187f8de38ab1d9ddcedd3e38e0459
font_00_sfnt_off00005a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A63 5416 bytes
SHA-256: 15940e8ae5e5d6a8f16db01c63533f92d370d3e351f8b881992d0ad00a95480c
font_01_sfnt_off00006cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 10392 bytes
SHA-256: 2f8f89da0ac01d6773f5097420f33711fa6a1716da9a579e994ce6e84cba81b7