Malicious PDF — malware analysis report

Static analysis result for SHA-256 490c9c54f544215f…

MALICIOUS

PDF

48.1 KB Created: 2020-10-27 08:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5a8b20c99c7fed483e899e1c3c92868f SHA-1: 9637a85f30576372e9d4721e43e1261d0f7e332c SHA-256: 490c9c54f544215f49de09ace8b41cf63540e0b127c3acb6aa4c2985acd356aa
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://ttraff.cc/pify?keyword=multi+step+income+statement+practice+problems In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/205644.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/1/0429/6579/4969/files/westinghouse_light_timers_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1657/1040/files/land_rover_defender_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3628/7391/files/dazoraxebakidevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ae9607-ad03-4b0f-ae66-fc022e74e822/61129986139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aaa5ef3-ea14-4d1d-9d27-0261d1b3330a/87486288927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafbdcc3-3bc4-4410-98de-93e1374e5b6a/36022002666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48bc13f3-eee1-47aa-a174-f3d4c811e2c9/20836030041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9d6bd9-c10e-4715-b6be-2fa4be4f9344/66988648880.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/41233331476.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/holland_code_careers_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/womulolodofoxovi.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/bevewikavejuruje.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/putapuwagulotafimexij.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/ccna_book_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b068b84b-cef6-494a-8e68-e30131b12baa/34247815277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53835bd3-6f6d-45e6-a5d6-d1997c8cb396/wejagugofemanef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383658f1-b0bf-4112-820a-57ed35bf81f8/16154907185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8568274-a2ca-47fa-9143-dc48ab68129f/dnd_5e_guide.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_off00007b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5D 5224 bytes
SHA-256: 7cedb03fc1594dd2e0b381e9d830491e3af90fd0aba73523216f5670c163f0bf
font_01_sfnt_off00008d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D04 11108 bytes
SHA-256: e416bbce8092e14855700512b4e9f481c277a618572b0f4ea22d052b1917f7f4