Malicious PDF — malware analysis report

Static analysis result for SHA-256 0032fb0795ff0279…

MALICIOUS

PDF

49.4 KB Created: 2020-10-26 16:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 3a3201c5235c843a0dbcabd307b14ec8 SHA-1: 10a86f3dc2ee35c382003a98b58bbb428e9a4b07 SHA-256: 0032fb0795ff0279a747e9afacbe30ec4d43e337526b51c6ec0bbcc76e385f15
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://ttraff.me/123?keyword=iphone+launcher+pro+mod+apk In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/6583825.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/89650.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/5171030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f8fb85653b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_5f8afc2e303dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5f9200d925b61.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/1/0485/8439/2869/files/goat_simulator_apk_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/9993/6662/files/30073860155.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/java_tutorial_tutorials_point.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/58061804859.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/80124773861.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/mezokutugijuzawew.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/abacus_worksheets_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/production_of_acetic_acid_by_fermentation.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/38126819754.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/xiwugifaseseviruxavunes.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/lolumi.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_off000080af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 5136 bytes
SHA-256: f9843be8393bd77ebedadb9d3d8b43cffc3a9ddea38aebca37f013481ce40273
font_01_sfnt_off000091ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91EE 11892 bytes
SHA-256: a68c012e768bc955f96340b4610b2ee35d50a2db907a1c153b8fe31711afeb82

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