Malicious PDF — malware analysis report

Static analysis result for SHA-256 6736a1f9c6d0fa9c…

MALICIOUS

PDF

36.5 KB Created: 2020-10-11 23:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6a97771d318afcff8fed9005b43aa49b SHA-1: 514dbfd5c3d8c358cee2047c2b5789b549d27973 SHA-256: 6736a1f9c6d0fa9c683d1245d47241a079ebc076ed915231028980f1e1baa65b
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=la+fitness+york+pa+phone+number In PDF document text
    • http://pobijit.vernonyoga.com/uploads/1/3/2/7/132740780/7845208.pdfIn PDF document text
    • http://files.kystudentenvironmentalcoalition.org/uploads/1/3/1/6/131636983/kupizulo_mimeki_vidizofilaze.pdfIn PDF document text
    • http://minikati.pasovacation.com/uploads/1/3/1/3/131384013/2e289872a3.pdfIn PDF document text
    • http://tuxanoj.marizageorgalou.com/uploads/1/3/1/8/131857966/2809896.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/5ffe89a5-f40a-4715-849b-046157bb538c/gikidudiluburizasuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013f9922-5ccb-4ef6-94e4-a4074cf8965a/linop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b433973-f552-4313-95ee-6a0cf8207541/11996658679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3cf89b-415c-43b8-8b30-5a2c9138fb71/99865308373.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b460bf44-8ed2-45d6-ba68-b1e2b83b56c5/tugazafalejuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130f70c1-72b9-4f87-923b-bcfa491c436f/14860025939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95d3b1d-ae9d-4d03-99cb-c0c26c6d591e/kisatamogabunaron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3de9130-c89c-44d8-9ce4-a4f7cb7f9834/watogexijopunaraxexuvire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8950/9017/files/aggravated_child_molestion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1125/4690/files/bokixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4364/2792/files/kimamub.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_off00004e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0B 5356 bytes
SHA-256: 14ec28029ee8eb101cba4ab42f20e6362dde1bdcf460ba87c7da70987bb78173
font_01_sfnt_off00006024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 10708 bytes
SHA-256: 84da35d68a0657f26350a55e773da1002db3bd9dc3181f83addd9316bd68ab9f

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