Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f92da062429be59…

MALICIOUS

PDF

42.5 KB Created: 2020-11-07 14:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: efa4790e2f633f9bd399c9252f58e8ae SHA-1: 9ecb94fab881ed80fa1d1ff2dcc1ee29c72af3ca SHA-256: 7f92da062429be5999f200b29bcd8058dbe8875d8579f4aeceb627a6d561fe59
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier strongly indicates maliciousness, and the document body itself contains the malicious URL, suggesting a lure to trick users into visiting a potentially harmful site. No scripts were extracted, but the presence of multiple links and the ML detection point to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffnew.ru/123?keyword=kingroot+exe+windows PDF link annotation
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/sakibugimakizej.pdfIn PDF document text
    • https://vasabofilusav.weebly.com/uploads/1/3/4/5/134585229/8f944423990c.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/5530776.pdfIn PDF document text
    • https://dujodorenenap.weebly.com/uploads/1/3/4/4/134488447/xesapuroned.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wifivow.files.wordpress.com/2020/11/musicians_guide_to_theory_and_analy.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/how_to_calculate_tax_return_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/irregular_verbs_past_simple_and_past_participle.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/free_printable_statistics_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/hitachi_arietta_850.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/75740903304.pdfIn PDF document text
    • https://mopuxupu.files.wordpress.com/2020/11/94567162677.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_off00005e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 4880 bytes
SHA-256: 1829be66a20b30359964a47d8f000af4eab5c02d5f99ab1ce9072241719e28a3
font_01_sfnt_off00006f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 14744 bytes
SHA-256: 04ffd8b2453eefd9e2f04203c5070ec5b86ea72b83e489c2e0dfdc1010138c0b

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