Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bae1083091a268…

MALICIOUS

PDF

40.3 KB Created: 2020-10-25 04:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: a5f0a57475d74b9ef6465efcd5e739dd SHA-1: 0d4dd16f9a9524bec62864eae86a4805e6b364a6 SHA-256: 29bae1083091a268a851e440f15218e6e839c44c65a726d0841835ec18dc9ecb
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/aws?keyword=haloalkanes+and+haloarenes+handwritten+notes+pdf In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/8732433.pdfIn PDF document text
    • https://wavupuzubeje.weebly.com/uploads/1/3/4/2/134235525/2c7262c131196.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/bbba2.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/noxafu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f8f1438b594b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f9485d89bfb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f8c1f497cac3.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/55a00f31-75d9-4466-97d3-0f91957c5cb9/82340211847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3196ad-8352-4ed2-ab28-62174362e2f5/gufatez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc9384f0-9a71-4222-8e8d-fa5c73ae51f6/mosumo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/binomial_distribution_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/textbook_of_biochemistry_for_dental_students_vasudevan.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/14101240891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/two_way_table_conditional_probability_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7706/files/jlpt_n5_all_kanji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0530/3190/files/mifomibozakewutas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1688/6678/files/47185416009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4415/4773/files/boforoxusafegujawim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/27583684193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3368/7750/files/gta_6_apk_download_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0925/3791/files/sazakati.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_off00005d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D78 5248 bytes
SHA-256: 69275d179913b6d2d8c059f1c79eb532d07cfb4e83e4cff98103089013e28a3c
font_01_sfnt_off00006f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F53 10632 bytes
SHA-256: 0187ded05dc1793b2baca0a4314e7ddb9ef9b8a9d10064f069e881a58b1bf1ee