Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f3131c4b1ed96a…

MALICIOUS

PDF

35.5 KB Created: 2020-10-27 06:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 37518b0430fdc1bd8d6580ab247e1402 SHA-1: 1e46347c3cfe5a18573bffb00f4a42974a4a8ae4 SHA-256: 38f3131c4b1ed96a3abcf661e6e89fc2ca718d2ee2c12620d379e1c9058df14a
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/strik?keyword=refillable+perfume+atomizer+target In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8c001be019a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f8b394786b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_5f8ebd48e296b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8a960386f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f89f5808f662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f8de816cbcbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5f953e2bbd246.pdfIn PDF document text
    • https://veforolafumokiv.weebly.com/uploads/1/3/4/3/134340642/kubivuvafujefe.pdfIn PDF document text
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/6388736.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/7651809.pdfIn PDF document text
    • https://fogajabewe.weebly.com/uploads/1/3/4/1/134131707/derevolixijekunataj.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/bisikerotofixevemop.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/a6a3aec9-8f6d-4b0a-b0ca-c12a4568a8fe/93452593264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80853ae8-ea71-4b23-843b-49376a5d1502/53068248529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3219622b-55ba-45c2-bbc0-4d43e3384058/cedar_summit_castlewood_wooden_play_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c26fbe-ec4b-4a04-989b-fbc0be788cbc/tisededogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59860144-8f80-4e21-90fa-18a538acf33d/list_of_positive_affirmations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3369/2830/files/bokadigevafuzor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5331/2928/files/fetabokesifiniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6593/2437/files/vubowodexop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/airtel_thanks_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6962/9350/files/65722616670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9711/0701/files/68054640665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9951/2740/files/karegivajenajefofadapudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/superworms_for_sale_ebay.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_off0000522e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x522E 5240 bytes
SHA-256: f3e4c529cf157fb2174dd6fb9b4874a449f4aaec3249fafd720825d03f2fd21f
font_01_sfnt_off000063fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 8344 bytes
SHA-256: 5f37d1b230157614ba44d0b9d5b7a4fdda4de4db4cbffd29807c50e1de51d6bf