Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a0d3608c8e14b6…

MALICIOUS

PDF

47.2 KB Created: 2020-11-07 22:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 88a00ffd553717b018608e88e96758f5 SHA-1: 9c1d906b1fc1c3f3400cc32f44937a4e458a8bd8 SHA-256: 50a0d3608c8e14b60e5bc632fc9a8af06943c3e1d998ba6878bab609acee989c
134 Risk Score

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.
  • 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://traffine.ru/aws?keyword=download+supernatural+season+14+torrent In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5f9b8add44001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f9a4157b2caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f90a5221981f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f8cb0a5815ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f89404b91fe5.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/4d6756cc-24e4-4a41-8acd-967257fe1dd7/numilajokajizid.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/36281038985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c9d832-1082-4e4c-96ae-01104263305b/29956160497.pdfIn PDF document text
    • https://gasajidi.files.wordpress.com/2020/11/fundamentals_of_accounting_1_and_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14746909-c8b8-4d4c-b76c-4b2722e0c127/84349871526.pdfIn PDF document text
    • https://karepoxazul.files.wordpress.com/2020/11/barron_s_toeic_practice_exams_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44c966b-daa2-49e3-a866-13bb032af246/lexisiwipaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6213 5184 bytes
SHA-256: 38a81110b19481aca423ea256e8b6ca5073afabead058c7dac5e3c05d093f84e
font_01_sfnt_off000073e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E8 11432 bytes
SHA-256: 135cc302ff476fa464e2755c613a66e6f56046f384a5748bfbf77385fc65795b
font_02_sfnt_off00009a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A06 16224 bytes
SHA-256: 9d460a08ce5493337ef3c2564e4763cf4885edc70a7a1040a5a810bb5abcd464