Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae3738763715e36…

MALICIOUS

PDF

72.4 KB Created: 2020-10-15 03:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3c4a3a822f2be01022bf7184a4902bcc SHA-1: 8427300c3fec12c2e03b2254630b33763fc514bf SHA-256: 2ae3738763715e36ddcb32d6baba6ad8ea9c77a06da3cf9c4c30ff2d34b6a937
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/pify?keyword=how+to+create+bitmap+drawable+in+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f876e523638a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f870913686df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8746cf5961f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f878b07c945f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8773afbb771.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/bogitasubitenawutaka.pdfIn PDF document text
    • https://paduxadoduxim.weebly.com/uploads/1/3/0/7/130775016/tatokitone-tolozigaxijigep-norikesuk-karikiba.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/7596933.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/8693852.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/1/0463/3319/8498/files/digital_pool_tester.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/multiplication_and_division_of_monomials_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/49438222310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8343/5674/files/87897188538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1457/3213/files/16607061032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/takakukutakesexezad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72799f1b-805b-4907-9f12-ad74bc608bea/nujosuwuwepan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fa697f-7a16-4655-8d9d-d9b255c3c9e4/tajemopolesonazizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0a8dd1-37d8-4a51-b635-50c48cdb4362/28887607549.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_off0000d1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DE 5232 bytes
SHA-256: 935bf3d57387d79993bc1827eea4761eb968d41020e8d2a6d74e7720d2682704
font_01_sfnt_off0000e396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE396 15412 bytes
SHA-256: c9933e42b1e6c02606923f8542190c630f04057ccc582e328db6b6924cc1512f

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