Malicious PDF — malware analysis report

Static analysis result for SHA-256 582502bd6c94b45d…

MALICIOUS

PDF

57.5 KB Created: 2020-11-07 03:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 7cdd8bc4d2b4f8026147aabd37d6d376 SHA-1: 6ff4ca2101d7b0e4d8b3bdc4e50a9a65946112bb SHA-256: 582502bd6c94b45d1da77005ccd5fbd859db8fc2eb70d1947f17192891b08677
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://traffking.ru/123?keyword=east+bridgewater+public+schools+calendar+2019 In PDF document text
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/1534332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f8ccf57d95b8.pdfIn PDF document text
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/0e1041401.pdfIn PDF document text
    • https://zajefepitav.weebly.com/uploads/1/3/4/2/134266194/a9a457.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/8814426.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/dba7b039-ae65-4f5a-847a-f813793c64ac/meg_tirrell_feet.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/sexilevowewulazixowujalod.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0dc766e-5f0c-4c00-8cee-9c61b7c2636f/6934332103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71c7c6e-fb8a-404d-b781-993d48b94dcc/59788696911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429675ef-5c06-4ddc-8022-f7cac68e134f/pozeb.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/spring_chicken_festival_2020_gainesville_ga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902a25aa-560f-4965-907d-1247502006b3/wewajakatovaz.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_off0000a133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA133 6004 bytes
SHA-256: 475d14deefe9daf98dd06ac03fddcd4208f3833ad3bf29d768d4b5c52c4ce70c
font_01_sfnt_off0000b5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AB 10372 bytes
SHA-256: 8a033f3608ec3446ef3a51df85fcb15dcdd10bd251bbd948efe5141d46aaa434

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