Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e0a90a74fc2eb8…

MALICIOUS

PDF

47.7 KB Created: 2020-10-05 03:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2b8709ab772f2abf9d13816f6fea1b15 SHA-1: ed895bde5ab82d73af168c124078722c34b7e0d4 SHA-256: 42e0a90a74fc2eb8d88cec91065fd860ef36f1e48a3743dc7571ac1472e6e96a
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=forever+young+mp3+lil+yachty In PDF document text
    • http://jemugojik.sigmax-yacht.com/uploads/1/3/1/3/131379434/3970602.pdfIn PDF document text
    • http://files.alphaomegaassociates.com/uploads/1/3/1/0/131069869/75164a56.pdfIn PDF document text
    • http://jador.thesweetwhiskboutique.com/uploads/1/3/1/4/131453574/pikexopubojena.pdfIn PDF document text
    • http://files.msimone.com/uploads/1/3/1/4/131453414/nidodi.pdfIn PDF document text
    • http://files.goodshepherdbarrevt.org/uploads/1/3/0/7/130775753/2811034.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/57386302830.pdfIn PDF document text
    • https://site-1038581.mozfiles.com/files/1038581/61347757784.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/81432199825.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/vinapogupaziwajufafazisuw.pdfIn PDF document text
    • https://site-1040443.mozfiles.com/files/1040443/33663472220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d5211bd7-f218-4e35-96d6-fa5b72648e91/21505342525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac749431-95af-4933-8951-d57167ab1b0a/78598109113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3d6b51-fdd8-4a7e-be16-744c5118749e/sidonapevufunorazuniwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5949d466-a05a-4041-9c52-8a4dda1a4cd8/zadogepotife.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_off00004e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E78 5332 bytes
SHA-256: 10a4431fbf33899d4e5fd97bdfaa55464164453f5d6ce24ee12aacf7ab9141da
font_01_sfnt_off00006082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 10384 bytes
SHA-256: 95ceb8a48e86afde4c874eedf5a84e9e975d7f8363794c0826432ef05983b296
font_02_sfnt_off0000844f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844F 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed
font_03_sfnt_off0000a1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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