Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca37fe30c1ff9de…

MALICIOUS

PDF

45.5 KB Created: 2020-10-08 11:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 37573b1a5ecb3ebb8458cb40a4c2ea6f SHA-1: 71da52a205010c2e7036887ad75bca763ce0177c SHA-256: 0ca37fe30c1ff9de0a9547d7430af7a406c27c9241ce2cde98b30607dea9dc43
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=to+selena+with+love+book+free In PDF document text
    • http://nibupive.flowyoga.co.nz/uploads/1/3/0/8/130814674/ziwufapizop_zaxexugur.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/1/0432/3996/4834/files/rna_vs_dna_venn_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6528/3238/files/walmart_safety_1st_guide_65_convertible_car_seat_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/88744898411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c4d395-8611-42b4-b75b-ba37412f10f1/pakobuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4241080-603a-44df-ab75-f23230842697/91056412719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709abde5-b565-4620-8282-c92a3a41316c/nafawepenovonekot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e4e3a5-6d9f-431e-9569-0fe2412e1861/27299142597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4622/7096/files/topl-2_standard_scores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/lepaxer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8680/1821/files/i_love_you_hearts_images.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_off0000677e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5160 bytes
SHA-256: 3e23880c7b54802306c37ce6bfab3a7aaffcd2da27274febce14d1442962fd64
font_01_sfnt_off00007918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 3120 bytes
SHA-256: c9b5c4904a063eda2fd006e21c0d11b7d9e09ba17605c18bcc17455d537c1e8f
font_02_sfnt_off0000859e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 10352 bytes
SHA-256: 0d6db8f8958230ff6e11b6e30b37a126601cb83a5afd60b047f7ff24d4512301