Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ea5d7e83324bb0…

MALICIOUS

PDF

57.5 KB Created: 2020-10-03 00:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0673d0e9ab279395e14641eeed46564b SHA-1: bb733636d7e554a2aa232c4dedcef40a5c78adef SHA-256: 59ea5d7e83324bb026b67d669910c2864f46f1c9a1146c39c9073aa7e2687002
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirect to a known malicious URL. This indicates a link farm designed to lure users to malicious infrastructure, likely as part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=the+glass+castle+study+guide+questions+and+answers In PDF document text
    • http://files.leehwanxiao.com/uploads/1/3/1/6/131607310/lupelowifako.pdfIn PDF document text
    • http://vipowoxoz.pioneervalleykennelclub.com/uploads/1/3/2/3/132302842/zonadonan-kotemafidu-komolibur.pdfIn PDF document text
    • http://misebuw.mikemorrisauthor.com/uploads/1/3/0/7/130740189/bifuvebexataripaki.pdfIn PDF document text
    • http://joginab.a1nerdyhomes.com/uploads/1/3/1/4/131413603/fufajaf.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/76531802555.pdfIn PDF document text
    • https://site-1037881.mozfiles.com/files/1037881/tomudawuzitunufudib.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/47477781997.pdfIn PDF document text
    • https://site-1039564.mozfiles.com/files/1039564/fovogirezafumerikor.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/f912705e-d73b-4afc-967f-5a98585427e2/25881582805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8459c106-39dd-4cd3-9904-4be5c5e6d11c/87355742688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07453648-04fa-46fb-88fe-bc3c7cd79bc8/85870513386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176852bc-a3f1-4f8f-82d3-0e7fc75d1d00/69812611960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0249f2-f32c-4ce3-ae8f-1912ceb925d0/82487630016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/8834382617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/dinamicas_para_nios_catolicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3835/0231/files/clash_of_clans_2015_hack_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/netflix_error_message_51330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/understanding_emotions_3rd_edition.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_off0000a1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B3 5468 bytes
SHA-256: d53624e651c802a59b1796e2147861483b1427327f2674e42c9da1943f881191
font_01_sfnt_off0000b45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45A 10652 bytes
SHA-256: e02561218e57df5ed6f134a2a133c5270cfd55aa0fcfc7512c881e4e34fa48e9

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