Malicious PDF — malware analysis report

Static analysis result for SHA-256 827cc1f2915009a6…

MALICIOUS

PDF

61.3 KB Created: 2021-03-14 01:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5b61344bfa86a6a580622784a662df3d SHA-1: c99fa58b8f2985e60021aa4f97dd63dc0d66a575 SHA-256: 827cc1f2915009a60f8b45be2f09c89630e9055ae3d801df08e67e243eb1b180
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9715

Heuristics 4

  • 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
  • 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://jottigo.ru/award?keyword=hemoglobin+function+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446649/normal_60067fed7323f.pdfIn PDF document text
    • http://kaxiwex.iblogger.org/11581855284.pdfIn PDF document text
    • http://ronitojaxebibo.22web.org/fatekalaki.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/2c2accdce1c679.pdfIn PDF document text
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/najejizit-zamusesokamage-metivabulene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5ff390b49ceb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_604933e287c9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_600ab1a563e91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5ffb1025d7bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fe7ce90cf99f.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/fedojigudaj/90449972015.pdfIn PDF document text
    • http://nixewawomito.epizy.com/53169303008.pdfIn PDF document text
    • http://bidupoxamejab.epizy.com/8319481634.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_a785414b8d1e4e5dbe5ac65cdb711ef4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/87303251744.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/beginner_crossfit_program.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_ad114e8b522e48658d4444da0c9cd7aa.pdf?index=trueIn PDF document text
    • http://xukulugix.rf.gd/psychology_of_love_101.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/94104695616.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/sherlock_holmes_sinhala_books.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B3 5092 bytes
SHA-256: 8630fe489b0046d7403a1d2d7f6448b201d989ff1ef674190dbcc8fc9c55ad66