Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd17e392d16299e3…

MALICIOUS

PDF

79.1 KB Created: 2021-05-24 02:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3464e510f6ee396aeddee8463e129534 SHA-1: 72f8862d0d020d01f15e6ab0d4342febb18e8ca8 SHA-256: bd17e392d16299e35d95f3944c51a323fb8ecc9055da5c17a384d75f500bcd5f
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9998

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 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.
  • 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://pelibifir.ru/strik?utm_term=shakira+estoy+aqui+english+version PDF link annotation
    • https://tedumevoseviman.weebly.com/uploads/1/3/5/3/135311532/84d360cca01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_603ec7eaaffa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459166/normal_601f20f6b43d1.pdfIn PDF document text
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/0ab52d.pdfIn PDF document text
    • https://gusagipo.weebly.com/uploads/1/3/4/0/134017144/tupufopegi.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/sigobija/57530853045.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/dadibiludeges.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/ginebibujowigafukudi.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/15388899721.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/72488053292.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/55270870367.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/adding_adjectives_and_adverbs_to_sentences_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/boss_movie_telugu_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/hwy_26_oregon_traffic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/gevupaxexabodemelesevidi.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/28912327069.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/you_raise_me_up_piano_sheet_music_advanced.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/32239833350.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/15734272041.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_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 5404 bytes
SHA-256: 8c7a83d2c5d791dc642ebde5347b85dcafd81fa31c2a119d8902c25ea36f0acc
font_01_sfnt_off000107be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 12080 bytes
SHA-256: 98ab576b207ab84949d51d7e56bc2d0d2f677b87417e720e52575ebdd7c5138a

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