Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9442f10e67bea02…

MALICIOUS

PDF

50.0 KB Created: 2020-10-15 06:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 223d437b5b5078c7ca47c5f6ab50b17b SHA-1: 9adfb81afd39069f7d6f14658ca007dffacec485 SHA-256: f9442f10e67bea027d2938ccb7dee9c90f270c6a2510c2c03a724617e807c13d
244 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/dujogibaw-xovozakarup.pdf.
  • 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/123?keyword=screen+time+app+android In PDF document text
    • https://site-1042510.mozfiles.com/files/1042510/23661907064.pdfIn PDF document text
    • https://site-1044115.mozfiles.com/files/1044115/zozisuxibalefetopijibar.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/56310957553.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/dujogibaw-xovozakarup.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/mafezoluruzowez.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/fubamoxul.pdfIn PDF document text
    • https://site-1048523.mozfiles.com/files/1048523/59939005880.pdfIn PDF document text
    • https://site-1043447.mozfiles.com/files/1043447/77063490036.pdfIn PDF document text
    • https://site-1042205.mozfiles.com/files/1042205/43951971536.pdfIn PDF document text
    • https://site-1038303.mozfiles.com/files/1038303/60117363067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e3c5d11a-ec42-4134-97b1-cf6d2805bfe3/pebijarisobiluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf2c70b-5360-4ab1-9ae9-fad9a5e47fe0/10541416769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489b6d19-dc88-4f7b-b352-df9f197199b7/12467198081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c57da3-12b8-4120-8754-491691028dda/25835601248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8a07bb-3ef3-4436-80aa-07eafdd38797/zeramitenimesute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d32dc1-7c22-4b7a-b9b2-7d617362645a/zotilevosef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946f94d8-db09-4d1a-bf1e-e43708104f36/dobelug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d0f75a-78f7-49ab-aff7-244268991c0d/vivanirupog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b45481-dfa7-4229-9703-0bbf4c1ee964/vepojujiromevejitid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696dd328-22e2-44ca-ba3f-34f98677c4aa/83208263768.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 4900 bytes
SHA-256: a1ab5a0d4df6cee74c69be6b80e3a4a1a9c9eff47c743509bd9a0a524d8e9d1a
font_01_sfnt_off00008851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 10656 bytes
SHA-256: 8e0b430803ada654831b69712d30feb0875a77df0cf601f714caa0eb588cf3a3
font_02_sfnt_off0000ac81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC81 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34