Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84b8146149a00b8…

MALICIOUS

PDF

64.0 KB Created: 2020-09-26 16:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7c06c6e086e1b40d05820fdf63ea7462 SHA-1: b97ae9bd21b6de76faf95cf59c0a2a19c2aa445e SHA-256: b84b8146149a00b851268cf4bb5bcad941fbc9ba36f349a5f4c12e185f6a7a34
242 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/pify?keyword=automation+anywhere+commands+pdf In PDF document text
    • http://vixemebu.laurenthea.com/uploads/1/3/0/8/130874493/vasuxugoxafe.pdfIn PDF document text
    • http://rovoxelig.splashsteamboat.org/uploads/1/3/1/4/131453526/fipesoja.pdfIn PDF document text
    • http://gedami.ohenrylibrary.com/uploads/1/3/2/6/132681352/tuvagometumudag_xinawudoje_lukeligonage.pdfIn PDF document text
    • http://files.crossthestreet.org/uploads/1/3/0/9/130969935/tidadika-zaxifunemiwubew-gerotolurof.pdfIn PDF document text
    • http://livusa.brskl.com/uploads/1/3/0/7/130775490/nixaz-sutifopoxixale.pdfIn PDF document text
    • http://lidubasuf.coburgantiquemall.com/uploads/1/3/0/7/130738711/rasim_jekiga.pdfIn PDF document text
    • http://files.bannermountaincanecorso.com/uploads/1/3/0/7/130738892/venijokibalowa_fivedo_guvosomuteje.pdfIn PDF document text
    • http://gefinitug.bongmontesathinkingschool.com/uploads/1/3/1/4/131410399/5c9dbdf5.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/1/0435/8373/3915/files/video_site_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/jumigowunaziridusotufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/biblical_greek_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/complex_numbers_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9325/7109/files/zelda_2_randomizer_tracker.pdfIn PDF document text
    • https://b2807bf2-bb77-43d3-bdc9-c5fa2a823221.filesusr.com/ugd/7e84b7_7738f4b68cf4405084a9965a2c073c14.pdf?index=trueIn PDF document text
    • https://02d82c35-a91a-41db-9561-63c44d4bc139.filesusr.com/ugd/735424_90b91d8c8d0b494fb6ca3903335c9f17.pdf?index=trueIn PDF document text
    • https://f1caa406-78e0-4af6-9d09-ebf8a176b219.filesusr.com/ugd/41a0b6_ec931d44197f4d878c5884ea2e9eba56.pdf?index=trueIn PDF document text
    • https://f372a0f4-10be-43da-b170-408ab6b551a7.filesusr.com/ugd/143c98_4fb94bc4f6624b86aec13f34d3274d29.pdf?index=trueIn 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_off0000b2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D7 5544 bytes
SHA-256: 6b879a92cbd73456890224df2609b41715af7664980263305c52388d22724875
font_01_sfnt_off0000c59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59F 14568 bytes
SHA-256: 365c828d90db518cdf3416a243086cd2de4a6d9314b29bdb085b15f7d48bd698