Malicious PDF — malware analysis report

Static analysis result for SHA-256 801e43aa500c6ee0…

MALICIOUS

PDF

44.4 KB Created: 2020-10-26 01:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 20c3d7ffe7a97785cf9ebf57075f7f14 SHA-1: 75ae7acc27b8470a78bea4c457c99e20f4d56b06 SHA-256: 801e43aa500c6ee07eae413cb80785096a79821859d0231a0c6eeb7e823c89ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for study materials, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=gate+agricultural+engineering+study+material+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8777941eb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5f8c8cba0e10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f90858cea701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f924145ccab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415530/normal_5f9605cb61e65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e391b67-feae-4846-8326-cfbde9eaa799/zidoguwisebofeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e4e9730-10e5-4b47-9cdb-a93498473cb2/54799435393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6781857-2ea6-4c20-8014-d7617a81e469/pathfinder_curse_of_the_crimson_throne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac59750d-063c-48db-90c9-619ffd1318f1/wuvetaragidujivisisaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ec0ee0-0c26-4f59-9fa6-30b57ae28c4a/tipivegevotufemeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/dance_resume_template_for_college.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5246/4804/files/formelsamling_matematik_a_stx.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2914/2943/files/11063246623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/27234134140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/vasupanutakizovunujalexon.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/core_concepts_of_accounting_information_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/adventist_church_history.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/accords_guitare_dbutant.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/22845203204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/lotolavobokamikute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5175/2344/files/11776251642.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_off00006c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C43 5608 bytes
SHA-256: c059f0e1478b74eadb682043947685130585c75b99b999d772b3d24a6aa3cb8c
font_01_sfnt_off00007f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F58 10940 bytes
SHA-256: ca84ceb5a2f2ee38d2c1d05da558e553c81cf4820721b17db60d901caf9fb711

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