Malicious PDF — malware analysis report

Static analysis result for SHA-256 e609ef6c8a9e6f77…

MALICIOUS

PDF

63.6 KB Created: 2020-10-10 22:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 89c1bc3da87708ef49cc7ca12d15ea1c SHA-1: f8f42654cb3524f7789cc83c79f918ed812d586f SHA-256: e609ef6c8a9e6f772ae7e89dda18084bcd0e9d2718cf7dace46f58cd59c19aeb
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=recycled+asphalt+pavement+as+a+base+and+subbase+material In PDF document text
    • http://fakodo.msiphotography.net/uploads/1/3/0/8/130813714/xodigadulewoson-gujuvudetip-popotogexanakut-vigapezek.pdfIn PDF document text
    • http://files.kisyoga.com/uploads/1/3/1/1/131163632/8886322.pdfIn PDF document text
    • http://vajatowuk.oweneddy.com/uploads/1/3/1/6/131606490/321231.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://uploads.strikinglycdn.com/files/e8151721-5255-48f4-871c-eab32719f319/68929522484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e3cb27-d10c-468f-b413-2ae50106c0c7/gedojovesov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/vakasonotiganovobilukox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0646/6458/files/ditisurebub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/74771993114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3497/9733/files/xazuzojerawamix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e646bce9-9faa-4ce8-8fec-6370853c0113/39417516020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554fe0bf-f1da-432a-ad5d-2a42f34582eb/wopijilodigavotaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfa1606-e559-47da-a4f2-4e38618ecfb5/88362573732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e640ce-e1d8-4bea-bd75-c2550c8ceefb/38992677738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9582ed-903e-4f83-86d8-86e3c0bb8a76/jewez.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_off0000a877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA877 5396 bytes
SHA-256: e4ceeabac3d94d3d4e98ec35e0e7bd2ee497b2a001e5c22cfe59f3e199bbe65c
font_01_sfnt_off0000baa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA3 12348 bytes
SHA-256: 80c8de0be4f31ff4e3ab477040f3be466acbdc2b39e00e5ab07b2b6db59e255e
font_02_sfnt_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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