Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3d4365ac3a1ae3…

MALICIOUS

PDF

40.8 KB Created: 2020-10-02 10:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c36d08a4cd2fc3b84d85bd35c1ae68a0 SHA-1: a39f5748806d831921f10ad1e16959f86de65c9b SHA-256: ec3d4365ac3a1ae38860f380ecaf9d7db278886338be2364a91b90f95d6a7498
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=slime+rancher+largo+combos In PDF document text
    • http://buvexole.hometechrenovations.ca/uploads/1/3/0/8/130874426/vidaposaxip-lobuvor-tasatak.pdfIn PDF document text
    • http://files.jamisoncarter.net/uploads/1/3/2/6/132681698/f452c.pdfIn PDF document text
    • http://xavakofo.jpendersbyltd.co.uk/uploads/1/3/1/3/131398222/3d3c5262ab.pdfIn PDF document text
    • http://diviz.zionsvillechamber.org/uploads/1/3/2/6/132681542/kakutupir_komaserifetizew_kivemexotopeva.pdfIn PDF document text
    • http://files.ridgeroasters.com/uploads/1/3/1/6/131606046/xowufe.pdfIn PDF document text
    • http://files.brandedshow.com/uploads/1/3/2/8/132815866/b4e56.pdfIn PDF document text
    • http://files.klaversclassroom.com/uploads/1/3/0/8/130814121/vofupupa.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/1/0484/6626/4214/files/the_jilting_of_granny_weatherall_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6266/files/naples_florida_white_pages_phone_directory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/a_guide_to_hand_tools_and_methods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4579/5493/files/63285757404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8426/6137/files/what_is_70_kg_in_pounds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3690/4090/files/20114662794.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_off000061ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 5456 bytes
SHA-256: 0df9dea71c6d89587816fc23f3432d2be1eb2c9ce3052424f3888d18fe4a013c
font_01_sfnt_off00007424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7424 10120 bytes
SHA-256: 67948ae6559440db3ececbb9a1367020884bd78681b8bad6d48b6297db51c6a7