Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee4a097fd087edd…

MALICIOUS

PDF

78.9 KB Created: 2021-03-23 18:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3bac9b9025b62d3dfadd062a4754abee SHA-1: 7f0189184f07e55e742b97e8407756b8f5d76171 SHA-256: 8ee4a097fd087edd62cd5034addabbbdd2d3ec80e8a5d471fdcc7d9d1b4f0a83
156 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is https://kuzutuzo.ru/123?utm_term=anamika+movie+telugu+songs, which is likely part of a phishing or spam campaign. The presence of a ML classifier flagging the PDF as malicious and ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=anamika+movie+telugu+songs PDF link annotation
    • http://wavarev.22web.org/naxebawuvoluvexumele.pdfIn PDF document text
    • http://zakozoxutujo.22web.org/soccer_base_app.pdfIn PDF document text
    • http://nufudotaruja.iblogger.org/wonokumirisakakar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_4c1c2273735d401ca10ce319aff23e93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/45117598025.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/abu_dhabi_drama_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/37025859940.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/proud_indian_army_song_video.pdfIn PDF document text
    • http://rolonitefokive.rf.gd/nowokad.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/89174284956.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/doditijuzus.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_3e9f956f4ad84958be6d5db815e85722.pdf?index=trueIn PDF document text
    • https://c0a42e0f-4cce-4e1b-84a6-2a5440198d67.filesusr.com/ugd/440b6d_d4cab973269748699b3df40c0fbad652.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31cccad-e45c-47a9-a22a-739c9998f5a3/fisigodogiburisifutox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468027b2-d41d-444c-b5d6-65d3ff29c77e/the_invisible_man_2020_movie_synopsis.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_c2906f1afef842f7baee312683cbe8de.pdf?index=trueIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_f80dfa5e969d45deb850e93d8d01e5ad.pdf?index=trueIn PDF document text
    • http://nesuvumuvugelo.epizy.com/mimirebodomusob.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_0a00ad793da84506a43e2f6426ef69c7.pdf?index=trueIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_8ea42d9f266441ccaaebaf62caeb36ef.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_4f81e120eef640dab692fb487519bb88.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_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 5020 bytes
SHA-256: 02de49769bae7dc77e72132aae31da859a683ed5d2dcdfb39e6e9dfbf220e94a
font_01_sfnt_off000107c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C9 11512 bytes
SHA-256: 08ba9461ae75d5fe0fb73d746e5c69800a919067c0f2abbb9a4842091f4b89f9

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