Malicious PDF — malware analysis report

Static analysis result for SHA-256 df046d5e82691e52…

MALICIOUS

PDF

40.3 KB Created: 2020-10-02 05:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edb469a25c4dc20e58a49be99f6f62db SHA-1: dc8100edad71a94cc5399edc11b6588ca108a596 SHA-256: df046d5e82691e528b52c790226e05a228cf2b00602ef9fd864ef4aaba5dc3b9
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/strik?keyword=strategyzer+value+proposition+canvas+pdf In PDF document text
    • http://files.sunlandservice.com/uploads/1/3/1/3/131384401/c7f15aee.pdfIn PDF document text
    • http://mepen.rocmazeng.nl/uploads/1/3/0/7/130776436/loxewi_noxilenemowaf_xunax.pdfIn PDF document text
    • http://files.notsuchsecretlife.com/uploads/1/3/1/4/131454731/kevigunote-gowidegi-namevu.pdfIn PDF document text
    • http://files.flytyingforcescustomtiedflies.com/uploads/1/3/1/1/131164351/bevijapunorewolopu.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/1/0496/5023/7604/files/ravensteins_laws_of_migration_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/dixenukake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/fibosiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3281/8076/files/berenstain_bears_new_neighbors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/vusem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9698f42-3f86-43c9-9c98-d4f3248c0711/17998732940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfb03de-4dc5-4545-8db3-893a65e30b3a/42802832197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ecb6552-9e4d-47bb-8996-987296dd4912/toliweteropo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1fa4ea-4469-4036-a464-7c8bc06d7d8f/dururererokuteja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873d39a1-c998-490a-b458-ad5b75ec7921/jarawivovidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4376/8488/files/how_to_calculate_covariance_in_excel_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/rock_salt_for_ice_cream_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9529/4101/files/po_chai_pills_dosage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4353/2185/files/zafodixan.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_off00005df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF7 5640 bytes
SHA-256: 2f6b6b15bdde275bef91424436fdf5b75aa7907749f017a2a31578c9a4f002e7
font_01_sfnt_off00007152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 10104 bytes
SHA-256: 8fba4826cf8c1b808dd3d70b9e0c3e37760456da0318a563b469981c1884c1b7

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