Malicious PDF — malware analysis report

Static analysis result for SHA-256 754c992449430bc4…

MALICIOUS

PDF

54.8 KB Created: 2020-10-04 10:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0561d8fb2a428d8d7dbf9ec22c75629c SHA-1: 23aed375fae751b179f04efd561be86493c863a4 SHA-256: 754c992449430bc45c5dccb87ecb9d2b515691f09ccb5d830edf9428be34a5c4
184 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.
  • 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://ggtraff.ru/strik?keyword=maria%2527+s+decision+making+grid+answers In PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/95939817543.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/26832595046.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/28084642812.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/jujorulukisugorafisemefoz.pdfIn PDF document text
    • https://site-1042025.mozfiles.com/files/1042025/wesixagoxekurasi.pdfIn PDF document text
    • http://bizepar.hermionemerry.com/uploads/1/3/0/7/130739873/6937627.pdfIn PDF document text
    • http://files.aspirewebdesign.co.uk/uploads/1/3/1/4/131437924/pakusox.pdfIn PDF document text
    • http://xadapogap.molisereview.com/uploads/1/3/1/4/131407263/2915f.pdfIn PDF document text
    • http://files.yogaforvitalitywithashton.com/uploads/1/3/1/3/131398541/dcf7d2.pdfIn PDF document text
    • http://files.blackcanyonpet.com/uploads/1/3/1/3/131381464/7686688.pdfIn PDF document text
    • http://files.jardindalice.org/uploads/1/3/1/0/131070487/e9ab1ffe8edae6.pdfIn PDF document text
    • http://files.thehomesteadacademy.com/uploads/1/3/1/8/131856919/2033692.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/4dacbb93-bac8-4918-a71b-9b0093717998/pirelubilavirofum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/785a154c-d839-4a70-8ba8-3ed7400a37d1/wiriximamutezazeguzug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4d3c2b-d553-41a3-a79d-60f28939b8e5/7920856360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa09e81d-364f-4678-9b30-6c79ba2a5b3a/nevokowuvoronafaj.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_off00009553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9553 5424 bytes
SHA-256: f96f30573d06a7b0ab787e7ee9d8011b7bf0988e01c01df87e50885885878880
font_01_sfnt_off0000a7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D4 11352 bytes
SHA-256: 79f82a5eb7f06cbc79b80639309a17eaac61a4a2be3f74753e88095a93e1ffbc

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