Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f330e58c624f423…

MALICIOUS

PDF

42.0 KB Created: 2020-11-03 02:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 637fce606dba83a3d181284a1bd680ea SHA-1: ac057a92f0c0e517185354151b88e31fa83b668e SHA-256: 1f330e58c624f423b86b31206e56c0d047be70ffe62520f9ea5c6f9a33520165
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://ggtraff.ru/123?keyword=st+patrick+s+day+2020+parade+pa In PDF document text
    • https://sobegivi.weebly.com/uploads/1/3/4/3/134311910/zijepezatolulib.pdfIn PDF document text
    • https://rizidapovo.weebly.com/uploads/1/3/4/3/134316848/d712687b1f79d0f.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/1617023.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/1a17a8284e5af3b.pdfIn PDF document text
    • https://muwamobole.weebly.com/uploads/1/3/4/3/134356931/3070579.pdfIn PDF document text
    • https://fuwurugosudopo.weebly.com/uploads/1/3/4/3/134326966/755f4ba7d53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb1ff91-212a-440f-8a4a-60e14fc6939d/fexavipupazinif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3737/6679/files/non_resident_cgt_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1171/0387/files/wajanunuruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5068/7387/files/big_fish_theory_itunes_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0087/5173/files/powered_gm_cardigan_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8479/5035/files/mumoperopijodizi.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/agenda_2020_para_imprimir_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9231/0693/files/ffxiv_weaver_levequests.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7411/8334/files/nanda_nursing_diagnosis_2018-2020.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_off00006546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 5580 bytes
SHA-256: 8b2764280702b14daf4b3c7a805ebb2cb46a1c4768e7d72732091886a9dbb41c
font_01_sfnt_off00007859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 10212 bytes
SHA-256: 95d32a34d237e617266d716a14a3f2e12d3e8639e059e7ed395eddbd88f606f4

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