Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c203327f1811aa…

MALICIOUS

PDF

42.6 KB Created: 2020-10-09 14:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 455ed5509d350d90d211e0177b5a331a SHA-1: ad38cf2f892ec65df60e04bb7ef2df4ff7f902b5 SHA-256: 84c203327f1811aa7773e8822cf35829b8a7543a9909f45b55bfc0c0491efd71
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://gettraff.ru/strik?keyword=vss4000+installation+manual In PDF document text
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdfIn PDF document text
    • http://xukodefe.lineelementaryptc.com/uploads/1/3/0/8/130874019/14a55a22bb07.pdfIn PDF document text
    • http://files.ritaonrealestate.co.uk/uploads/1/3/0/7/130739744/4792950.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/1/0438/5888/6806/files/ti-81_contrast_adjustment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6580/files/92733484186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/nose_ring_gauge_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1771/7918/files/22878944044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5680/6565/files/clara_oswin_oswald_asylum_of_the_daleks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/ethiopian_education_system_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/41107091854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/crank_dat_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4ec96f-2c50-49c0-b0db-2b58a97a7a89/90077419019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfe1c37-18fa-4731-8a1a-fcf09c8ed5c4/bagiburuvavaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99205551-6ff1-4eb0-9522-4914d86d1ed2/15359158581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f4780e-fe7a-4903-a35f-aa6dddb1411b/rinedelagebovunavumupu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45BD 4696 bytes
SHA-256: 28082911dcb3c484d6dd1e17828f76dc3eb13a64321a5056d5821d9a0a466b22
font_01_sfnt_off00005592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5592 10344 bytes
SHA-256: bf0f6326371326b45f9b9a69efd07dd7dbe7f3a5599de880cc944882b66d44a9
font_02_sfnt_off000078d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 16132 bytes
SHA-256: 6f1ff871cf6f8a11a72652b45576c366cdb39a1ef29e9eb747fa7a572d777da9
font_03_sfnt_off00008d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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