Malicious PDF — malware analysis report

Static analysis result for SHA-256 828cbe0c6023a9e5…

MALICIOUS

PDF

43.8 KB Created: 2020-11-04 03:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-20
MD5: ef28e2191d1330f27e077ef6fc095783 SHA-1: 416740ff54bbd7b08910fe7b31d094e17404f88a SHA-256: 828cbe0c6023a9e52df5f7c75456704fda275b5c4ff28e1bfa064967f88ba260
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://ttraff.me/123?keyword=manual+sprinkler+system+valves In PDF document text
    • https://niliwuwez.weebly.com/uploads/1/3/4/2/134265541/devevabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f8917fbf3097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5f9a0cd581ffd.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://s3.amazonaws.com/fasanag/folding_chair_with_footrest_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/ralogifowukodokutej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf0f606-9b43-4c00-b129-1eb1b66ecdec/81940609150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1d6b97-5e7f-4ca3-9ce1-582eae4f1c01/Funny_toohey_cerveza_comercial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f35f66-6827-4c1b-9a4d-642fd2990679/sooryagayathri_hanuman_chalisa_mp3_d.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/56048759315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb132e4-3abe-4621-a692-9545e6e580ac/diwamumenezonipujex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40297a4e-266b-428a-a552-542d40ba9d5e/wetitumugilevatawig.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_off0000610f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 4968 bytes
SHA-256: 97006874f0cd2aaf8d9e85c14bbe7a7b90e8c72a6ba70543e80a4d07a43aaeea
font_01_sfnt_off000071e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E2 9960 bytes
SHA-256: 1f9f98c535a16578103df9984dd84732e876ee902f04729da1e5508c17fef128
font_02_sfnt_off0000940c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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