Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d03c1a837b4d360…

MALICIOUS

PDF

45.2 KB Created: 2020-10-18 08:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 960cd7dbab8311fe1a4cb72d6232e984 SHA-1: a461044665718c6270af042aa9af519a56b2e953 SHA-256: 5d03c1a837b4d3604352ce0d1a3b2ca3e40e6f51389019c135ab6775c681a84e
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=walking+dead+season+1+mod+apk+rexdl In PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/4420470.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/986ca1.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/wubami-pikijetosili-lebopoba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f8975cc18360.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/wepixixifob.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/4546679.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/suvex-xebubonozov-gavubukegago.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/9978589.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/f9c6bdb7-82e9-47d1-b7d3-1063dba41756/wawuvezotupigomik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abab859e-ea5e-4269-ac19-3dee31a3a9cc/28309938028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b13da22-21b8-497f-814f-8b759717740a/80548170409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ddbc086-e214-4f5c-9568-ce7870f5e618/34278933868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0902737-11fe-495b-b627-8f7f683c7003/kerevafitinowakeduri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bbd7ba-ffbc-495f-a07c-5455ddb9f1a6/fowafakitojekotitupiluxax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945dd7cb-0bfe-4689-973a-14b865c8f757/24297614001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c794f1-d503-42a8-a394-04f07d78e346/wasogumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e678ada5-051f-42fb-970c-d72ce8368c91/63814052551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5718/3400/files/62959526188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/58745929277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6869/4943/files/votimujulodurebexula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/bewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/41667645971.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_off00006f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F48 5476 bytes
SHA-256: f7d957aaaa772f8cb567e2dbaba276a4c35b4cc2a59210e60145ae40fc72d6b3
font_01_sfnt_off000081e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 10920 bytes
SHA-256: d8f450a48fdbd38d7fc2b3faa5186d3147f4f8fa4b59c48078b5344e9abeb5f6

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