Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30ae7a8221966d1…

MALICIOUS

PDF

76.5 KB Created: 2021-02-20 01:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 55d96915771c7c65f2b2433f4771088a SHA-1: d338b78b7213723264a0178d73b4d1ed78e86683 SHA-256: b30ae7a8221966d1fc40bf48897317a63cd83e5f1fb640083ef1769b31de9d01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=japanese+from+zero+book+1+pdf PDF link annotation
    • https://lujinelux.weebly.com/uploads/1/3/4/3/134361227/e28be464a1dd.pdfIn PDF document text
    • http://liketsven.xyz/4990906301529lqa.pdfIn PDF document text
    • http://edalovert.xyz/canela_movie_charactersllxlq.pdfIn PDF document text
    • http://comforfemj.fun/loxosodobezevogakonalowe299lz.pdfIn PDF document text
    • http://vykupavto54.ru/297476143533xk1d.pdfIn PDF document text
    • http://kubarabonexomi.iblogger.org/aoac_966._23.pdfIn PDF document text
    • http://hookup756.fun/48399526276a3iko.pdfIn PDF document text
    • http://kinokaiff.space/crochet_penis_scarfmur2x.pdfIn PDF document text
    • http://nipojugotav.iblogger.org/22279255298.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/xafaxotaful/termotanque_ariston_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/how_to_test_petsafe_shock_collar.pdfIn PDF document text
    • http://lidufaz.epizy.com/hackintosh_catalina_vanilla_guide.pdfIn PDF document text
    • http://xonifovozub.epizy.com/html5_bootstrap_template_github.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/62856735365.pdfIn PDF document text
    • http://jegafat.rf.gd/71008784002.pdfIn PDF document text
    • http://rotitow.rf.gd/html_template_design_tool.pdfIn PDF document text
    • http://ledolabufimo.epizy.com/bloodless_medicine_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 5744 bytes
SHA-256: a7bc5aa1ca2354e5d629353eb7a475cdcdc1e75bd1e67a0a1c57d7497b90c00c
font_01_sfnt_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 5448 bytes
SHA-256: fc760cea5660ae5fec317b8d1c1274469a4e9883379e15c3abd2ac9ee5e052e5
font_02_sfnt_off0001000d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 10552 bytes
SHA-256: 0ebf097d8b1ed150a8bd506751559355420161339fb524136cf0a929be48d826