Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b63633769a9160…

MALICIOUS

PDF

42.9 KB Created: 2020-11-05 05:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 1e2947262cd20d0de4fc2754b1899a2d SHA-1: 9c82ab2b1f21fd71a01216eecae583be50133daa SHA-256: 61b63633769a9160bebe4e1fa9826cf56e2c792b0945899c3820c07d95a3f6b3
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://gettraff.ru/aws?keyword=i7+tws+earbuds+setup In PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/56aa225fa15cfad.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/1594859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_5f912f1170a74.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/1/0482/9315/0875/files/julutobizilak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8089a2-c816-47c7-9a34-2b7cc2a0a606/36763149979.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/vmware_vca_certification_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/warrior_cats_the_apprentice_s_quest.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/mob_imprisonment_tool_ftb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6d3fef-2f24-4711-af09-ede64990f188/navy_nsu_collar_device_placement_e4.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/nuxitanokarinupokajeken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1391/2222/files/52654788320.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/93335539118.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/organic_chemistry_1_for_dummies.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_off000068d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D4 5172 bytes
SHA-256: f46d88713f85f6a7a4d4e875b84b43fb3ccf5005bb15fdc7262abae63c19d205
font_01_sfnt_off00007a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A89 10636 bytes
SHA-256: 8ee6b8e4a0894a341717dbfea6ad0e3d26984d8eb69ca26cf9feac7a31771613