Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31d8ffdf12ab7c1…

MALICIOUS

PDF

64.8 KB Created: 2021-01-13 12:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4e609c6b731983c6d72b37cb29642d2b SHA-1: 14959bf7e30d6bd0db1df13fc01855828f7cd72b SHA-256: b31d8ffdf12ab7c1dcd77aa6694583e2f77405667459733776a1d1c738143c04
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to 'moxie beauty bar fair lawn nj', suggesting a potential lure for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://gettraff.ru/123?utm_term=moxie+beauty+bar+fair+lawn+nj In PDF document text
    • https://posanawefu.weebly.com/uploads/1/3/4/7/134711745/futobidatanunaz-domafideritara-titutiwoze.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/qggiiie/time_traveler_from_2030_meets_himself.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5fdad7e53a2af.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/bakirora.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/mopulixopibegazip.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/supasonasitev-wirofav-notikozelipuv.pdfIn PDF document text
    • https://dunawotota.weebly.com/uploads/1/3/1/4/131438316/6963595.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/woberiz/dokep.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/neurontin_weight_gain_information.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/lufiw.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_off0000b889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB889 5064 bytes
SHA-256: e05ebfd9bf1a97c458da2374948fe96265ed56da72db6dd40c8c16f5267b1c78
font_01_sfnt_off0000c9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FD 1852 bytes
SHA-256: 5ae1d259d034084be61ec780dd0ff4f7394a348651cf58c8458f9478dd568280
font_02_sfnt_off0000d2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2ED 10392 bytes
SHA-256: 42c360ec201b296d00f6d1513ad1dd9246f3df011341d41edfe227d433c7aa41

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