Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19a9e295cd4995f…

MALICIOUS

PDF

42.9 KB Created: 2020-11-09 09:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 80c02d81d845ee63fb99dffc4203a171 SHA-1: f9e1c0b98410a02aa775db2953a233cda28d8322 SHA-256: a19a9e295cd4995fa8b75869419df5d557556b0c84b0568af0a81446917ecc84
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/aws?keyword=rubric+for+lesson+plan+evaluation In PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/2150016.pdfIn PDF document text
    • https://veforolafumokiv.weebly.com/uploads/1/3/4/3/134340642/kubivuvafujefe.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/6788170.pdfIn PDF document text
    • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/mejuzuxif_wujobilurerane.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/miwowufamurid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5f9d0ba986cc7.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/nipilorupak.pdfIn PDF document text
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/870062.pdfIn PDF document text
    • https://zewonawexekuke.weebly.com/uploads/1/3/4/3/134318694/7781bc8998f.pdfIn PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/nunuzonamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://luzawivi.files.wordpress.com/2020/11/19234093213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbee392-72b1-40ba-9863-d303c4039d80/72785021596.pdfIn PDF document text
    • https://wobonil.files.wordpress.com/2020/11/58401365237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975b62ca-373b-489c-ac0f-d7ece287c423/11076692672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ad5821-c033-4e3c-944b-e5381cc174da/dagew.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_off000068f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F3 5216 bytes
SHA-256: 145c4ff3bfb8d1136702bca8a7b62257c00bd39ca98ab55a86f48e6396c51ed5
font_01_sfnt_off00007ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACE 10604 bytes
SHA-256: 618a7550b1b9d8f8714af64290e07b659904b4012abe812e57d751f33a6e12c2

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