Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8ce671f49def9c…

MALICIOUS

PDF

50.7 KB Created: 2020-10-06 09:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 89067bdfb527c162d4a4ca92e341bc59 SHA-1: 0ed757f838e1dd6ab6173db9c481a27dfeb81110 SHA-256: ae8ce671f49def9c5790d4a7e9cd1b44af1a67526ea078cf7fff01c81b72c326
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=mafia+city+resource+guide In PDF document text
    • http://polufufi.gbdeafswimming.org/uploads/1/3/0/7/130775934/4608779.pdfIn PDF document text
    • http://files.zen-gen.com/uploads/1/3/0/7/130738636/gowofolovotobufus.pdfIn PDF document text
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdfIn PDF document text
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.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/86771dad-a5cc-416f-b246-6cd63d0e587e/bifiraxub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c592b7ed-93fe-4f72-a57c-6c52c1efc52b/31616778922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92fab2b-fc12-4986-9acd-85fab6415c03/setuwevenolavigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d5a786-c861-4d3a-9065-bb1506e9bab0/vuninulegorapere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d298e8-f188-4105-9008-9cc18c34d6cc/33929935108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554d80ad-e60d-4af0-9d2e-8f7aee843526/kewigiwujupabawis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/814d294e-25aa-4f31-87be-0073d69fddd9/94629323160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de05c14c-b47f-4b35-9e01-eef8d4bb46c4/49984907652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0801900f-5ab8-40d6-94a7-dbb6f695a597/pamewaposodovuroserot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7893/5448/files/blackboard_adams_state.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/98496590587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/dijadotitalabuluri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6079/files/kajunawujulif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9252/1383/files/30047215674.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 5264 bytes
SHA-256: f410115aab5e3d0381601876177e17e80fe384366d23f3fc6ab576cf8d7ea4e9
font_01_sfnt_off00008407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 10472 bytes
SHA-256: 99c7184ac52a5b418334cf71030ad35f48528edcce3569990ea9fd846eb03041
font_02_sfnt_off0000a7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BF 16288 bytes
SHA-256: 640bd3bbf1cbc1881bebdb366c3def348bdee7395f391602e797cbc5d39a1bda

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