Malicious PDF — malware analysis report

Static analysis result for SHA-256 399f450791d4cc87…

MALICIOUS

PDF

49.1 KB Created: 2020-10-08 10:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e0757d73d6b5294fce47b6d8ea31b64 SHA-1: 972504dbbefe23824d010059b579e36f5f0a850f SHA-256: 399f450791d4cc871318904fe88d23465b4b8c41af2cc0d714bce65c3dff5a31
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://cctraff.ru/pify?keyword=measures+of+spread+include%2528s%2529+crackyourinterview In PDF document text
    • http://files.northstateayurveda.com/uploads/1/3/1/3/131382673/jekizike.pdfIn PDF document text
    • http://files.franciscreekranch.com/uploads/1/3/0/7/130775432/loritazix_wabebesirababo.pdfIn PDF document text
    • http://files.cynthiahoyle.com/uploads/1/3/0/7/130775795/xejulet_pizokakakug_rovupi.pdfIn PDF document text
    • http://files.mmarshallchurch.com/uploads/1/3/0/8/130874655/jelizizufizafas.pdfIn PDF document text
    • http://files.golawnservice.com/uploads/1/3/1/3/131381288/3d48191.pdfIn PDF document text
    • http://legez.axeandroothomestead.com/uploads/1/3/2/6/132695356/kowexakixo.pdfIn PDF document text
    • http://files.candicelindsay.com/uploads/1/3/2/8/132814050/zozowinoparakizorixi.pdfIn PDF document text
    • http://files.grandvalleyfibre.ca/uploads/1/3/1/4/131453636/ed4b7377bbe9.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/1c25d8f5-860e-4e56-8489-edb8d2bc434f/sugesowave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a802317b-dd6f-4866-88b0-a30548608a6a/doluzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82549809-2d06-44a1-8df7-ecd96871cd10/budobumuvuvozepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/rajujovog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/brainpop_chemical_bonds_quiz_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8920/2851/files/xamumidukufexudosezef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9538/2939/files/vcr_manual_tracking.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_off0000757b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 5628 bytes
SHA-256: bdd4b57cc10fd5e764d0bcf05ee18ce4491dd0660cc84e85e03a63680e27737e
font_01_sfnt_off000088e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E9 14864 bytes
SHA-256: 8f92a70868338e5cbd5ad88325ae0c8116c6e5a92af2d3689b8e5c78c341ba30

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