Malicious PDF — malware analysis report

Static analysis result for SHA-256 718177e571111eb0…

MALICIOUS

PDF

44.7 KB Created: 2020-10-16 14:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cf94d3d8f29da7e1105778317622dca9 SHA-1: 1455c60d3f12e274d7be0869624977a703ff90b6 SHA-256: 718177e571111eb09b6ab95fab22e0fdc9f70d77efae96a385283d89412422cb
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://ttraff.me/123?keyword=dewalt+20v+multi+tool+manual In PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/63e6123097d7.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/busixakowun_zefisuni.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/38b26bf5443.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/309006dd.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/c893a7.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/dudokad-rajutanim.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/6095284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f891803575f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5f896a8bb3876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4549/4177/files/wifi_mouse_pro_apk_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/beguso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4756/2645/files/fusanawuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/itemized_receipt_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6656/2966/files/estatuto_da_oab_resumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2400f2d9-f278-45be-b208-6de703d1b21c/43485967552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7614acad-4df3-47f3-8fe5-b08d920b82c9/setijepiz.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_off000070c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C3 4980 bytes
SHA-256: d12c8af167840f1711a16864fda4d2132f6cd0b6e753ac80ca9ffb4d2b3e8d12
font_01_sfnt_off000081c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 10592 bytes
SHA-256: 1ab6c4b510c985c07833e9b2b3a1aa69b4b90d5bd7665da1ee84f48addab9b3d

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