Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf30652c652491d0…

MALICIOUS

PDF

76.5 KB Created: 2021-03-18 06:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ea0a34a8021bcf11e321d179041b3c73 SHA-1: 59527a868da7f8d9aea2fc312cda5105bb256281 SHA-256: bf30652c652491d0aa6c8998848f34a6370877baf1c63baea1881e94b49ebf62
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 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://golowaki.ru/wix?keyword=summoners+war+apk+mod+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424331/normal_6043972b08629.pdfIn PDF document text
    • https://tuwijojax.weebly.com/uploads/1/3/4/4/134477229/b818b7418d00.pdfIn PDF document text
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/nekaxe_dumakovabosena_firalex_vizitovakub.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/cxzOkjc/helicopter_toy_for_sale_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/giamgfZ/minecraft_pe_beta_seeds_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/cRKWYpc/38867825290.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/9783816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_60120b91ab3fa.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/dRahghi/90511066466.pdfIn PDF document text
    • https://zitasiga.weebly.com/uploads/1/3/6/0/136088478/5b21909456cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_604e8d6215618.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/4130508.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/ihDsWjb/major_mayhem_2_level_30_3_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/gaduwifawide/f7fajb1/vobonaxunuked.pdfIn PDF document text
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/7d2122dcb3.pdfIn PDF document text
    • https://sufidubiziden.weebly.com/uploads/1/3/4/7/134732268/letune.pdfIn PDF document text
    • https://cdn.sqhk.co/ponajadu/ihhiZx0/amazon_prime_cyber_monday_apple_watch.pdfIn PDF document text
    • https://mokakabatedi.weebly.com/uploads/1/3/5/3/135300589/564217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_0b0b234bcc8f4a81b12eb55754b3de4d.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_7b1584dd240148b8b2143e20b40b5220.pdf?index=trueIn PDF document text
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_ac5bbeb4007a4d2293a7150be3a36ede.pdf?index=trueIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_2f76eee5b5df439ab847a433fafbe6ad.pdf?index=trueIn 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_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 5608 bytes
SHA-256: 292b08cd546b5eb95f8dc240773a5ddaa2bccba0eac24182981dd3cff1a63a5a
font_01_sfnt_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 12072 bytes
SHA-256: 7d1b80766594cb4198a05a39d8762bfcb67a4bf052ddf1e612ae57304fff3ccc