Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e03a22e56bf3a3…

MALICIOUS

PDF

82.2 KB Created: 2021-03-03 09:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4fdfa733d4d2ee53dcd7438c4d4685a5 SHA-1: f9718b1c4acc6bb3a651c9e65ceb450b4c9d8bee SHA-256: e0e03a22e56bf3a3caf2d72473ad1aaa89a7583be108f48ed352cee21ea6e012
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the link farm heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=types+of+plumbing+fittings+pvc PDF link annotation
    • http://ig-support-service.com/keep_talking_and_nobody_explodes_fro8rxh.pdfIn PDF document text
    • http://health-top.ru/raju_bhai_full_video_songsvi6x2.pdfIn PDF document text
    • http://sberin.xyz/karuppasamy_kuthagaikarar_audio_song_freelj8vj.pdfIn PDF document text
    • https://bivilasafufi.weebly.com/uploads/1/3/4/6/134689398/motoze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379380/normal_5fe1eeed947e0.pdfIn PDF document text
    • http://dutov.org/153117183491m9jn.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/jeu_de_carte_solitaire_en_ligne.pdfIn PDF document text
    • http://erethiztzj.space/cdl_study_guide_tnospei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5ffade850cf15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_603ed3283b569.pdfIn PDF document text
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/2530112.pdfIn PDF document text
    • http://tehnopolis.org/jodudagimije08.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/haritada_kaybolmak_ka_sayfa6zt0p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 5280 bytes
SHA-256: 79c1e7106a97dbfd02bf6bb108f8ba367361fb48c542e01a9882a2c6cd3668b2
font_01_sfnt_off000115b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B4 11388 bytes
SHA-256: 978a3dad2be758709cbcb4dea0d202b77a46e10560d5aeacfa24247b15e950dd

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