Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f626b2ad4695520…

MALICIOUS

PDF

46.1 KB Created: 2020-10-03 00:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b850bb5c2c2f10d9d09e58e800facc2c SHA-1: eb336d5cfb3754b4d5eaee098c5b58a0548bd180 SHA-256: 9f626b2ad4695520adf7f3aa9d9d9320e8eff4b015739527edfb78546fd95928
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=alice+in+wonderland+where+are+you+go In PDF document text
    • http://donire.burrowsmemorial.org/uploads/1/3/0/7/130775403/1a1e6924.pdfIn PDF document text
    • http://files.rr-cc.org/uploads/1/3/0/7/130775714/1d22777f9c10.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://uploads.strikinglycdn.com/files/d9cbf53a-2f72-473d-880b-b0609eaf7759/62607474067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982cfd16-110c-42ce-be1d-993d00d6a0d4/23650704675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd2aeef-5886-4637-91d0-668a4caf3ac4/vaxuxozozakete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7383d7e-f381-45f0-bc45-0b5773bbc5de/vojelefaduton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/the_god_of_small_things_main_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2997/3157/files/the_organization_of_congress_venn_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6237/9940/files/panedunonapagumoniruriwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/9094169837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/java_swing.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_off0000639d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5008 bytes
SHA-256: 61966473d6b03b4226c9c73a9108812bcf7ac36c428b926a936ec702552d1f3c
font_01_sfnt_off00007497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 12796 bytes
SHA-256: a33f7ee3c0b660cfc993691d6f4de44b807ee5c9efc80becd876cd8beb4bd862
font_02_sfnt_off00009dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f