Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f3e175b5687531…

MALICIOUS

PDF

45.8 KB Created: 2020-10-07 11:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 519e65dae05b9ccc4a47a8f7ea2f481c SHA-1: 6e6650488b2d4c3ccee450f28efd53317f8e3cfe SHA-256: 27f3e175b5687531a40f26ea832f85607815b7b42ab6261332a07a571f529c5f
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://ggtraff.ru/strik?keyword=american+pie+reunion+download In PDF document text
    • https://site-1038868.mozfiles.com/files/1038868/91716974336.pdfIn PDF document text
    • https://site-1042590.mozfiles.com/files/1042590/velepatitodejewozax.pdfIn PDF document text
    • https://site-1042670.mozfiles.com/files/1042670/zalevalunawigoz.pdfIn PDF document text
    • http://files.arlingtonteosinte.org/uploads/1/3/0/7/130776220/86e486db3f96e.pdfIn PDF document text
    • http://tebokupe.hazelsnetogo.com/uploads/1/3/1/4/131453119/3edcf82dfb5.pdfIn PDF document text
    • http://files.breezybrigade.com/uploads/1/3/2/3/132303077/jizotelafozupox.pdfIn PDF document text
    • https://site-1039924.mozfiles.com/files/1039924/85732909839.pdfIn PDF document text
    • https://site-1041090.mozfiles.com/files/1041090/26691912587.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/69786021699.pdfIn PDF document text
    • https://site-1038581.mozfiles.com/files/1038581/sobatixuzin.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/88410392089.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/1/0480/9742/7619/files/andrew_loomis_figure_drawing_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/mubipene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7845/0840/files/el_santo_rosario_miercoles_amen_comunicaciones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4087/2350/files/84811121421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4897/1671/files/95044349168.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D5 5124 bytes
SHA-256: 8e49e43d2577a8ab8767b431655d1d8089ce298b9746a58b6b8f33c800a2a182
font_01_sfnt_off00007a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A31 4860 bytes
SHA-256: 7d24d34d4670f16dc366b3fa8a837f34076e30bce8bd44b7fd1a087849edf676
font_02_sfnt_off00008766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8766 10100 bytes
SHA-256: 074df04f47bc4c9913704a0901b6d7ec83097f851a2d4660b1202c7a973b510c

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