Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd71d65407652d7c…

MALICIOUS

PDF

54.3 KB Created: 2020-09-30 07:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4008ce2defb3c16375ba1fb496297b8c SHA-1: 11eb4ef9b6cf2d0dfed5a42dec86d26aa24d2fab SHA-256: fd71d65407652d7c142c595c35625dcf914f344ae35481e62468f090aa9a32dc
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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://gettraff.ru/strik?keyword=free+brush+lettering+practice+sheets+pdf In PDF document text
    • http://files.thestringbean.com/uploads/1/3/2/3/132303170/2907399.pdfIn PDF document text
    • http://files.luminaridresses.com/uploads/1/3/0/8/130874583/5652603.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/1/0437/6471/1575/files/functional_grammar_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/bertolt_brecht_poemas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/chemistry_all_compound_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/54740421733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6668/6629/files/zabiroxirotevuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12182b2-2370-487d-a9b8-1c821fb537ff/53785318236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c7b1f7-86ac-475a-bf37-ac84b587fe14/komoxivogaridixuzusoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3c7078-ebef-4a9f-b519-63c4c1be9793/40686039020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a62ae07-e517-40c9-9484-457c6b05e24d/kafiripovulukalopelodub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e3ee83-ddd2-4ad1-a931-acfbd1493dca/daforinilekewejuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f1f813-d944-45ad-9e62-f1d681771550/jaludebus.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000727f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 5284 bytes
SHA-256: c48a9d07846c4d741b2e843a07825dbb455920e0bafd078acbaba312aef7ee1f
font_01_sfnt_off00008464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8464 10552 bytes
SHA-256: bb5e59e579bbbb4dcfc04d77be93d775380b586ada472c281550e68977f42edf
font_02_sfnt_off0000a832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA832 16328 bytes
SHA-256: 56a5e70d518c66885b443fa91e7c03a7c23418c0e3f447a4191ba12881aad585
font_03_sfnt_off0000bde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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