Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32b2c731bc521f0…

MALICIOUS

PDF

42.8 KB Created: 2020-10-26 17:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: edae7c6a64eeb08db1ecc6de9602ea46 SHA-1: 8f270714951624ffc43d6ead5989e527d0907c88 SHA-256: d32b2c731bc521f0eb38920e12949c956a1f040074fd1469fad2044d20adaffc
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/pify?keyword=helly+hansen+coat+size+guide In PDF document text
    • https://wabemogulumog.weebly.com/uploads/1/3/4/3/134384503/1fa8310488.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/4418160.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/pafatojuj.pdfIn PDF document text
    • https://zidabowejixu.weebly.com/uploads/1/3/1/1/131163559/komilebog.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/6583597.pdfIn PDF document text
    • https://jedufopev.weebly.com/uploads/1/3/4/4/134490540/tamosukerivasuwofi.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/wutowopariw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8a2758dfd8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f96bfeac64a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8b43b5c277e.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006757.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006757.bin)
    • https://cdn.shopify.com/s/files/1/0437/5173/5448/files/sistema_mexicano_de_alimentos_equivalentes_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/fuvejeberax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3805/5841/files/best_free_unlimited_vpn_for_android_tv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/9135/4534/files/top_10_android_messenger_apps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8632/4933/files/lista_de_verbos_en_ingles_y_espaol_en_todos_los_tiempos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5293/files/krups_savoy_coffee_maker_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1820/9438/files/fuji_xt2_manual_lens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8273/6309/files/edwards_est_3_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/level_of_social_media_addiction.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/zefuxalananajirezewimuwar.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/liduzu.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 extracted file (font_00_sfnt_off00006757.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6757 5216 bytes
SHA-256: cab43b1baf9f9e8205eaf3c421b28a0086fc4ed4378962c781b135d304f62fa3
font_01_sfnt_off00007917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7917 10648 bytes
SHA-256: 0ae1ab8376a9619e1e688ef38759cee19bc7ce621788254c58802e8535b84b88