Malicious PDF — malware analysis report

Static analysis result for SHA-256 f765a8f7299536d5…

MALICIOUS

PDF

61.1 KB Created: 2020-11-07 03:47:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: e26a5d6f91ff510da361d877ad184fed SHA-1: c8e96b6564718ff5e1347350e9cb61ee65783ddf SHA-256: f765a8f7299536d5fc214ac65e40e53a5707e9b545e7c654358909cdf5af9ca9
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://traffine.ru/aws?keyword=boyle+s+law+experiment+answers In PDF document text
    • https://viwawisigox.weebly.com/uploads/1/3/4/3/134342504/2082584.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/waxadi_tozanidiba_fabosizakiru_zazit.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/teximajovevogekapad.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/nugizexof_zosigetazef_zajajasugenewak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f88a9c2b902f.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/bejedixovirusididero.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5fa04689ef6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f9498a90575d.pdfIn PDF document text
    • https://fikazimibugexu.weebly.com/uploads/1/3/4/5/134515259/3595806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tugumeb/91660492599.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://movezuzeva.files.wordpress.com/2020/11/atoms_and_molecules_class_9_notes_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/spanish_numbers_worksheet_1-_100.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/gudexibekesiredikeli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9672 5276 bytes
SHA-256: fb037f9c88bb1fb9f3ec5a92eab937cb7e1b5ed451644852bdbd142004d8855c
font_01_sfnt_off0000a86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA86D 12252 bytes
SHA-256: d17ea129ff8d4c95f281d67aa3837bea265283450a294fdc725108c38d464670
font_02_sfnt_off0000d106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD106 16316 bytes
SHA-256: 1b3cc4d2df0c3776b92afc4c4d91ab8fd803a1a5b3d01fe4e4862cb926564984

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