Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a26344b06e81fb6…

MALICIOUS

PDF

44.6 KB Created: 2020-10-09 12:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 513f61fe04bad361b1926e6bacacbd6b SHA-1: 750be5bce722e055b46da06c6eec2cdf598f5406 SHA-256: 9a26344b06e81fb6233771fbb822d3577c04211a11753a917d2e12aa2fde7638
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/pify?keyword=los+alamitos+school+district+calendar In PDF document text
    • https://site-1038599.mozfiles.com/files/1038599/97204707396.pdfIn PDF document text
    • https://site-1038627.mozfiles.com/files/1038627/juzetetugagezibomen.pdfIn PDF document text
    • https://site-1039253.mozfiles.com/files/1039253/11212075453.pdfIn PDF document text
    • https://site-1039886.mozfiles.com/files/1039886/masiwugagikiwik.pdfIn PDF document text
    • http://files.currereexchange.com/uploads/1/3/1/4/131407155/verabegikip-lexope-laxuwonutojupi-tatebadakefo.pdfIn PDF document text
    • http://files.dontbeacrashtestdummy.com/uploads/1/3/1/3/131380845/xumuruz.pdfIn PDF document text
    • http://files.knightsknews.com/uploads/1/3/0/8/130813846/bizilugu-xetebaseju-zuxasoponopaxu-lajotavifujoke.pdfIn PDF document text
    • http://dogave.thegraphitestore.com/uploads/1/3/2/3/132303028/5038120.pdfIn PDF document text
    • http://wovozezup.literarycats.com/uploads/1/3/1/4/131453109/7e380792607a.pdfIn PDF document text
    • http://pesefawu.lineelementaryptc.com/uploads/1/3/1/6/131606027/kemobab.pdfIn PDF document text
    • http://nosoxufon.andydoveyphotography.com/uploads/1/3/0/8/130874397/5820943.pdfIn PDF document text
    • http://zivuxawa.nfynia.com/uploads/1/3/1/6/131607163/34037d15562.pdfIn PDF document text
    • http://files.ambrosescholars.org/uploads/1/3/0/9/130969076/gujejipozub.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/38f364ad-eec9-4860-994e-f6c5e3510ba5/75626658053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28dd78d6-f41d-4188-91d5-e6675369d32b/jajokuteru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b26b50d-8b8b-40b9-81b9-9591c568bd3a/41015500551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427ca344-501e-41fa-a8c9-92e45c840546/40966906584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb8b0f8-e354-4b38-94a4-6e1ffa93f266/79096459260.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_off000070be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BE 5120 bytes
SHA-256: 76385f70a99a66ac07ff9efdf642559e3a0a7707e909a4d92e58b63daccbfba0
font_01_sfnt_off000081fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81FD 10248 bytes
SHA-256: 002ea38232e5f298ee53a73c390503756f8a43b654c43e2b3bd45dad139e475f

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