Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43b7c3746dd6c98…

MALICIOUS

PDF

48.3 KB Created: 2020-10-18 02:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 44cf509f1c7582d934463909bfde54c9 SHA-1: 7185c8aa46a674a759412d80288cce332fd80ca0 SHA-256: b43b7c3746dd6c98afbe63c2a25c4afe8335cc01dfd2daf9680ac25bac5f437b
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://gettraff.ru/123?keyword=entropy+worksheet+chemistry+if8766 In PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/781ea332.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/nulerowuda.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/bidevegamowiz.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/zomulitonosijobalujo.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/5747744.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/fada5ae.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/faneru.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/50362084-6d1e-438a-9acf-ab741e8006e2/86745168768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa29cfd-d3c6-4c5f-a233-524052f86b50/52683712292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c39007-eb5b-4b56-b11e-232e9e451efb/fidijabifojoluxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278036a4-f401-4003-898d-9ab44493e093/66278221344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bcd7b03-f84c-422d-a2be-4e612432630b/togokidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e8e466-a23b-455a-9b4c-65bb0e1371cf/29593909320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98d3224d-b588-42d9-b395-efa9ff897cfd/pijonuxubafirofibezotav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/jupuresawezasojoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5562/files/lesson_plan_register_for_b.ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0279/6442/files/73885530900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/common_noun_and_proper_noun_worksheet_for_class_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8583/3416/files/fojopobisosutexow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/juniper_default_password_root.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 5656 bytes
SHA-256: 24907d670ec357637d1aef95522424a69427b85305eb90d32daa1330dfe0f7fa
font_01_sfnt_off0000847f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 15264 bytes
SHA-256: f8a95442e63ec73b2f38e06018bb2975a0f926b033ebb5293f04464eda99a84b

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