Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08ee24273e766f8…

MALICIOUS

PDF

78.3 KB Created: 2021-03-20 11:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1e5e6c2a8c8d1ee1c55679378b53b968 SHA-1: 529207b547dc8bc080f2864a3877475efd98799d SHA-256: a08ee24273e766f8b8c46d0629e60ffd7f68df1b5235bd50cb20cb91b9346d2a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm, suggesting a malicious intent to direct users to potentially harmful content or for SEO manipulation. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the presence of embedded URLs and the link farm heuristic indicate a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://kuzutuzo.ru/wix?keyword=fr+john+riccardo+reassignment PDF link annotation
    • https://popagupo.weebly.com/uploads/1/3/1/4/131407300/5088053.pdfIn PDF document text
    • https://xojunujad.weebly.com/uploads/1/3/1/1/131164104/1bd4fac8a7d66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498997/normal_5fda1f07166d8.pdfIn PDF document text
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/bijirazob.pdfIn PDF document text
    • https://damaxebibotewud.weebly.com/uploads/1/3/2/6/132682848/c51eef.pdfIn PDF document text
    • https://vepezoroz.weebly.com/uploads/1/3/4/6/134605761/2b1cf897c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_604f882316d56.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/sizabo/runekogebodogafiribajoj.pdfIn PDF document text
    • http://rupatuzibe.epizy.com/frases_del_amor_en_los_tiempos_del_colera_libro.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_42218708e4084195856f8941d427bd47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jagux/juditupa.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/how_much_does_a_sports_lawyer_make_a_year.pdfIn PDF document text
    • http://zabukek.rf.gd/sijajupevuvuragixatite.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/kukinumibemowodi.pdfIn PDF document text
    • http://jibufunipibavu.rf.gd/xuxise.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/exercises_for_carpal_tunnel_syndrome.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_d11886ae895045e7a4613901f49aeeec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ximupuv/39290229383.pdfIn PDF document text
    • http://fubejubede.rf.gd/garapimuzutijam.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/32133954460.pdfIn PDF document text
    • http://pijularof.epizy.com/changer_clavier_externe_qwerty_en_azerty_android.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_72edf74a86b24ca7b15055ffbaab1787.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_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 5352 bytes
SHA-256: d94c2d1eec200b4ac01026fca656d5bd09bab50fafa11b50f18190592ca02ef7
font_01_sfnt_off000106ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EF 10968 bytes
SHA-256: 6106f37b98ef6e4d3f13f541fd81c2b07a0e6dcf4fde41cc03ba9ee8f1c642fc

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