Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56d406940ff99f6…

MALICIOUS

PDF

66.6 KB Created: 2020-11-06 17:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2267da9378e54c972da361f4711c72ce SHA-1: f0cf427e40c0050339d5543fc20e9fe1aad3b257 SHA-256: f56d406940ff99f63497cfb7cae15f9700ae4b233c355a873e8b5ab47002f566
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=guitalele+chords+chart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f9c9db6bd2d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jopafez.files.wordpress.com/2020/11/supobijovinolaxunege.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://wetopego.files.wordpress.com/2020/11/birik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6976f8d-64cb-4c5f-8357-988ee2178907/xitulejafute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4eefac-1efa-4d93-ae46-a9f570ad004c/mofebifobemumotinus.pdfIn PDF document text
    • https://lukamukiza.files.wordpress.com/2020/11/cigar_box_guitar_building_books.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/bupedugizam.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/31410178814.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 7952 bytes
SHA-256: 407c5a02b96bd64cca14f2e7d40b7f1a9420bcc922d3a7d68571e9d4291a53e3
font_01_sfnt_off0000a922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA922 5056 bytes
SHA-256: 674eca81df925d69233b322fceaef0813ca4fa6543d0ed9724306e253ae4e469
font_02_sfnt_off0000ba46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA46 13636 bytes
SHA-256: 5bdd04cf01b4f5d0c5fa207ece2b64fea55cc3407bf114c52dc6e753fa8c7efd
font_03_sfnt_off0000e607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 16776 bytes
SHA-256: 13d60d01af700798e056bb9e2e53ea303e052a9a2860d157e43fa19f64d24110

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