Malicious PDF — malware analysis report

Static analysis result for SHA-256 8147f693f3d12142…

MALICIOUS

PDF

96.8 KB Created: 2021-05-07 01:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a2ed71e11e3b5952ef2b00fa7ee24362 SHA-1: 47e4b895a2313f08d01983237b7fbd9410240a3c SHA-256: 8147f693f3d12142fdab975e70564bf9a66c11c24fd408ab950bcee52103a120
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF containing multiple external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'The Half-Blood Prince' book and movie, aiming to trick users into visiting these malicious URLs. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/strik?utm_term=half+blood+prince+book+vs+movie PDF link annotation
    • https://xewuligatojijow.weebly.com/uploads/1/3/5/3/135395235/8016038.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/tapibelag-vowobejul.pdfIn PDF document text
    • http://themarkuzmusic.com/2826966536ui8vd.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/fozomujilebekejobodo.pdfIn PDF document text
    • http://2020coupons.info/babelulebogadiguduxorulsrj26.pdfIn PDF document text
    • http://dajumike.iblogger.org/74529502896.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/learn_english_story.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/xakofo_rifesu.pdfIn PDF document text
    • http://normaa-id.com/rukasininejawags9zau.pdfIn PDF document text
    • http://cccckkkkkdd.space/rug_carpet_3d_model_free_downloada2a7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rorobuneki.epizy.com/zagezejutivewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07d7b0d-998b-407a-b595-e855288142be/23801410414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1f1fa0-ceb2-452c-a7af-e6f99eb3ae59/rurugo.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/lolegiruwimejexazos.pdfIn PDF document text
    • http://saveluvuwu.rf.gd/golang_template_slice_element.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/assamese_funny_whatsapp_status_video.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_off00013b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4F 5528 bytes
SHA-256: c0728379129a5d04139f426fb299be33c8f9722e9371eaf25e127acef5270586
font_01_sfnt_off00014e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E07 12092 bytes
SHA-256: c7c7289d1679ee36fbd67f57caedc0b766f9176822764d1e7d50db75f28b7611

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