Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73a67eef637a49b…

MALICIOUS

PDF

75.2 KB Created: 2021-03-02 19:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8e0b82a5ad8bbd3d80a0c1d042df70a2 SHA-1: 5e51b4d9a27384f45c83dc011c140eb01d694b2b SHA-256: d73a67eef637a49b24cba87337b227ab5273deef600f9023241c5c312509c7c1
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple suspicious links, including an invisible link to 'http://managerprogram.live/lovizutusumofapimoxexhxsq7.pdf', suggesting a phishing or malware distribution lure. The presence of external URIs and link farm characteristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mezovuduw.ru/award?keyword=excel+for+dummies+pdf+2016 PDF link annotation
    • http://bcipreactivaperu.com/62040366937jh27e.pdfIn PDF document text
    • http://itverys.space/97566736890855gy.pdfIn PDF document text
    • http://50offshop.info/besoxpi03b.pdfIn PDF document text
    • https://vadopesi.weebly.com/uploads/1/3/0/7/130738994/dures.pdfIn PDF document text
    • http://managerprogram.live/lovizutusumofapimoxexhxsq7.pdfIn PDF document text
    • http://lynciguest.com/jiluzidupqhvc.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/hdjdLLE/17136099193.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/113db6e9.pdfIn PDF document text
    • https://biwamuneluzotip.weebly.com/uploads/1/3/2/6/132696598/2568039.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/cbUUSnp/flying_flappy_bird_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/dwupfig/minecraft_earthmc_server_ip.pdfIn PDF document text
    • http://kkkirrreeee.space/26112355874cnj0z.pdfIn PDF document text
    • http://minuette.me/free_editor_to_word_converterv5n1z.pdfIn PDF document text
    • http://kinokaiff.space/kunivazaqow5.pdfIn PDF document text
    • http://hookup153.space/tanzania_one_bongo_movieb9sl0.pdfIn PDF document text
    • http://generalmassage.online/gsm_alarm_system_sim_card_in_canada2vc2s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuliwopiveti.rf.gd/49210175746.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_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 5596 bytes
SHA-256: c83c6af441539bceddf615e13ba2adb93f86c415b14768d66a8c65bd5c6b3af6
font_01_sfnt_off0000fb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4E 10404 bytes
SHA-256: b915a51f40d43ad6771f164a8003a264565b5bde46968de56361fd6afe7b2040

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