Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c80c3fec8d6b533…

MALICIOUS

PDF

53.0 KB Created: 2020-11-01 02:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ce9bdc01c1653ef51c5f2d43e26c5822 SHA-1: e48926bf5d9bb50d8eb4a1393373d971492c5364 SHA-256: 4c80c3fec8d6b533a673a20fe1f2ab2d3a6a195464f7cab99090508743087bfe
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=blaze+wizard+skill+guide In PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/rixipizadijifoxovidu.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/bubutekalej.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/3f032a.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/zojixip.pdfIn PDF document text
    • https://xemivigezeb.weebly.com/uploads/1/3/4/4/134481563/2ab4ec13a6e4.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8fb3b.pdfIn PDF document text
    • https://zupusifeduligam.weebly.com/uploads/1/3/4/3/134313264/ropan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/libro_principios_de_quimica_peter_atkins.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/millennials_consumer_behavior.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/applied_anatomy_of_stomach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0707/2185/files/dysphagia_diet_level_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/zanazar.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_off00007fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB0 3908 bytes
SHA-256: e4170edbe9bfe1f2c9144926a2c3f4f7157413abafe21c8e816fe9b96565b5f7
font_01_sfnt_off00008da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 5248 bytes
SHA-256: cc9b3a3054b7098ae11d0ab8a14fa0c62c9b2329bdbafc1c45bd1af5ab840090
font_02_sfnt_off00009fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA5 10992 bytes
SHA-256: 7be3372b73d7e75d7bc7d7667ed23d200da6e30fd8a3897757c3b9d28df52789