Malicious PDF — malware analysis report

Static analysis result for SHA-256 98795a2527ca725b…

MALICIOUS

PDF

38.9 KB Created: 2020-10-05 06:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6c5df89696a4a45f99c3f47b14e56bc1 SHA-1: 673c7286a21901fd9d0e60984aa40d2fa1aee1ab SHA-256: 98795a2527ca725b177723b411eba4bb3b3b24a6ca17a5bb0be07fdb7c0634f3
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=prodigy+p2+brake+controller+manual+pdf In PDF document text
    • https://site-1038529.mozfiles.com/files/1038529/60448983241.pdfIn PDF document text
    • https://site-1039877.mozfiles.com/files/1039877/95373036632.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/dudawiwisizewapedumo.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/fetige.pdfIn PDF document text
    • http://waxis.njoutdooradventures.com/uploads/1/3/1/3/131384401/kurojilotuxisal.pdfIn PDF document text
    • http://lawufu.shadowcreekchoir.com/uploads/1/3/1/3/131381762/056378c.pdfIn PDF document text
    • http://files.mdpropertiez.com/uploads/1/3/2/6/132680874/5409574.pdfIn PDF document text
    • http://menofineb.maltingsstructures.com/uploads/1/3/0/7/130775818/1180863.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://cdn.shopify.com/s/files/1/0460/0650/1543/files/10530393551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/24_hour_gyms_in_plantation_fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/16835216368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9889/files/niridoxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7859/9066/files/nhsn_patient_safety_manual_2018.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_off00004c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6C 5620 bytes
SHA-256: 8ed45c396d7cef3b068b9e8368dbc4030f031439fcd7b1210d9d99a8d490d0a8
font_01_sfnt_off00005f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 9696 bytes
SHA-256: 8961a1a279d39f2396f85186127dd03749d5411d384d701240259878f2c4f993
font_02_sfnt_off000080a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2