Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf773bef2b642f5…

MALICIOUS

PDF

41.3 KB Created: 2020-11-09 12:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ec95bdcdf90b4fefcb8234bf43f1cda5 SHA-1: b098cbf9bd3b2d63a92fe9b0862729fe8396b06a SHA-256: abf773bef2b642f575ec4a7eb3d2ca6908d50265373dec2763ec47a92eefd533
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://ggtraff.ru/123?keyword=philippine+basketball+game In PDF document text
    • https://xukabasal.weebly.com/uploads/1/3/0/7/130776322/letodona_sofoxenovaba_jasotedelumuke.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://laxaxaxiw.weebly.com/uploads/1/3/4/5/134528460/votibevigulowuzep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5f88ca27a3552.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/9895965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_5f97ac599a1d4.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/romot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5fa01eebdd8e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/5782024174.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/pa_inspection_stickers_how_to_read.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/does_joel_osteen_have_prayer_request_accounts.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_off00006292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6292 5340 bytes
SHA-256: 143f350eedff92a4d18dd40ec3cc493575471eaf24d747a4028c1fa04361498b
font_01_sfnt_off00007498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7498 10604 bytes
SHA-256: d21de9c93a2d0c3c5636824dcf4b8bf26ae20e482c5ae047d8fde0d706c5fb09

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