Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c535777e66afcb…

MALICIOUS

PDF

70.7 KB Created: 2021-02-20 07:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b7956ee2003eaf4fc28793335ef43cdb SHA-1: b920b2e411a574fa4109f63025cbccb14153d5be SHA-256: 88c535777e66afcb90d0f0a77fc49ecbad7c3d63bd45d043f5e9371e3aff0f49
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document body contains text related to a search query, and embedded URLs point to domains that host PDF files, suggesting a phishing lure. The presence of external URIs and link farm heuristics further supports the malicious intent of directing users to potentially harmful content.

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://maypoin.ru/wix?keyword=bachelor%2527s+grove+cemetery+disappearing+house PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370077/normal_60120b59dab49.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/6599146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478134/normal_5fce179edae7c.pdfIn PDF document text
    • http://xufotegebiv.22web.org/sikefumejoxafoso.pdfIn PDF document text
    • https://wufikaxom.weebly.com/uploads/1/3/4/8/134883002/80e4d4031969.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/2676474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fd5f078d0ff2.pdfIn PDF document text
    • http://radulifivezej.iblogger.org/56557840465.pdfIn PDF document text
    • https://xuvurabog.weebly.com/uploads/1/3/2/6/132696285/vizisoroxirap.pdfIn PDF document text
    • http://balonedud.iblogger.org/financial_performance_analysis_report_sample.pdfIn PDF document text
    • https://pukakanasosakum.weebly.com/uploads/1/3/5/3/135392678/dabosin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipulitexaxuz.epizy.com/jatitulirogivulakozaz.pdfIn PDF document text
    • http://botuwosolu.rf.gd/81798828806.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/regibiwarokaxewikoj.pdfIn PDF document text
    • http://gerosopidazab.rf.gd/banner_creator_software.pdfIn PDF document text
    • http://marakolin.epizy.com/giraribo.pdfIn PDF document text
    • http://disigulopenanij.rf.gd/kezibawamuvanuroxemuvejog.pdfIn PDF document text
    • http://pamakejexo.epizy.com/fowesufur.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/tatalaksana_dermatitis_atopik.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_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 5732 bytes
SHA-256: 47025eed6fc8b39cf80ff855b0607ea237005862efbfdb3fb224347382c8d5a2
font_01_sfnt_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 10024 bytes
SHA-256: 4567f5518291bd2cae7dcdf2af18699e5d500d7b64406dbdd1b22f1447b60623

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