Malicious PDF — malware analysis report

Static analysis result for SHA-256 381725e7e98763be…

MALICIOUS

PDF

37.8 KB Created: 2020-10-12 11:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b4ebc37c81e17b0b4ac6d31adcbc7ee7 SHA-1: 7e73f5bac7b2e7d46ef13d4a7ad2a6253ebeea80 SHA-256: 381725e7e98763be51a121f08480f6f1e51b44a392d1291c1ab1329008d1f0b6
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=indo+chinese+recipes+pdf In PDF document text
    • http://files.mycccamp.org/uploads/1/3/0/8/130813531/2846606.pdfIn PDF document text
    • http://wizuzamof.alekstaistra.com/uploads/1/3/1/4/131437421/ad250dcdaf0d910.pdfIn PDF document text
    • http://fofabavo.pitkincountyrivers.com/uploads/1/3/1/3/131398140/xidedimuburebo.pdfIn PDF document text
    • http://files.birdandblossom.com.au/uploads/1/3/1/3/131379183/66b59a297aa.pdfIn PDF document text
    • http://files.kodalylevelsseattle.com/uploads/1/3/1/3/131398367/ralaseverore-satex-luzirubimip.pdfIn PDF document text
    • http://files.joefryguitarguy.com/uploads/1/3/1/4/131453808/vadodedokumekos.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/7c02fca7-8cd9-49e2-ae57-696742ec3261/zinepesuwegudazomurusede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aba3345-ee1b-4f66-8710-e1ddc1caf4ef/87242979891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec6b4c4-d730-4af5-815e-a39ea25baa5d/jadawifogapomagimol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59ae350-9adb-4fca-a797-b0f023a1a14f/2201339133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9329/8851/files/zofep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/82499716487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/perfect_games_ames_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/panasonic_dmc_sz7_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/gyro_cup_holder_3d_print.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_off0000583b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583B 4936 bytes
SHA-256: e8a09be2e1ea72831bc8e1849ff4fd935b6f723ad8c79ca7cc0f3b106bc3ab73
font_01_sfnt_off000068fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FC 9920 bytes
SHA-256: d1e12110a84cb45dae7702cb3af088349bc2718ce67daa4a3f77c5b4c989ed0f

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