Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d36c8cc94c0f816…

MALICIOUS

PDF

73.2 KB Created: 2020-10-20 19:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: b42e314d36141714ae5f107bc75db557 SHA-1: 2a173c0b3dbbbbe17272bb3c61e00f9b9221e184 SHA-256: 5d36c8cc94c0f8164c2ac9b07d9ad8fe1f99e888299d1dd45f120f57f90972bf
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.link/123?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D9%2583%25D8%25AA%25D8%25A8+%25D8%25B1%25D9%2588%25D8%25A7%25D9%258A%25D8%25A7%25D8%25AA+%25D8%25B9%25D8%25A8%25D9%258A%25D8%25B1+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5f8d54d5dba70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5f8b80e7c9979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f89af969b05c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8694/7500/files/vogel_organic_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1353/6426/files/genenevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/gt_racing_2_hack_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4533/1359/files/34324642181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/wegufepebiwubejuwexava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0863/8106/files/baby_einstein_musical_jumper_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/definition_of_autonomy.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/81533637069.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/puxedujud.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/tuximewojabedafojivarofi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ligavaloni.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gisop.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/3485492418.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/20890426597.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/42738799786.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/mitadozo.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/10892357283.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/bevisemasika.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/37919257153.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000cd1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD1D 32288 bytes
SHA-256: 2b5d99b24bb074f3f03a4d718c168f9964f32a974fabf9cea80348b76606f76a
font_00_sfnt_off00008757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8757 3748 bytes
SHA-256: 20af0361dd33afab489d9cc0ebba4ac728a4e21729fda7d2a575b71250f30764
font_01_sfnt_off000093f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F0 17872 bytes
SHA-256: cd4eeaa0c00ec0629cd53899297726ebade3f6624566ba8659068b679be5018c
font_02_sfnt_off0000aedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDC 8792 bytes
SHA-256: be1b320c830010505bcb43943063b3d70c33e66b6f7a023b93f4ccce93a0bccb
font_04_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c