Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1301d73a3d9400…

MALICIOUS

PDF

94.8 KB Created: 2021-03-27 22:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c14e153d0241442180f8e324240814e4 SHA-1: 1195ae4b80fa9913f9227db1407beb2a8e86c1bf SHA-256: ea1301d73a3d940019d371ac2d00f095820fc9e233f05d3cf8ae53a80008db5b
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of numerous external links, many on disposable hosting, further supports a link-farm or phishing lure strategy.

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 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://maypoin.ru/award?keyword=wave+motion+problems+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5fdfd53194245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_602d33cd92c59.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/tanoxulutofagesox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_602455f829ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_605718c462b05.pdfIn PDF document text
    • https://ginimowawogob.weebly.com/uploads/1/3/4/7/134753870/fidip.pdfIn PDF document text
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/vusuliwesodatafan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374848/normal_5feb4214ab5bc.pdfIn PDF document text
    • https://werijumifisa.weebly.com/uploads/1/3/4/7/134729585/gorawed_wezujujezitakam.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/wizise_rilitad_jixugab_gazolowidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530712/normal_5fe7a03883d2e.pdfIn PDF document text
    • https://pewaruraxifazof.weebly.com/uploads/1/3/4/3/134340131/fexiduxajizufe.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/litagukukev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5ffc0361abcda.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/71697709952.pdfIn PDF document text
    • https://kukonugaxa.weebly.com/uploads/1/3/5/3/135327287/dcf4f9d461eb878.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/xabalaru/photoshop_digital_art_brushes_free.pdfIn PDF document text
    • http://rorazizaxaf.atwebpages.com/corporate_entrepreneurship_and_innovation.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/75303329579.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/woboked.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/attracting_perfect_customers.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/all_video_player_for_pc.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_off00012ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDE 5400 bytes
SHA-256: 36c9efa6d73f496867b21568595c953443205be1bd7dd1f1cb190c1fc98f508c
font_01_sfnt_off00014127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14127 12592 bytes
SHA-256: 30feb45ee44803f9c7adb7e567b6cdeb454e1fcb2a41b213a724bf984cbe4572

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