Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b6b6acb1db7d56…

MALICIOUS

PDF

79.7 KB Created: 2021-02-25 08:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8548bd7b4f822d1ac0eda7fbd6f24417 SHA-1: 979921203a4ac24f255adce6c21bb9b12d185cee SHA-256: a0b6b6acb1db7d5634758f76ca38fca2edf375e45adfdba0d7a72b0323b27114
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+to+program+dish+remote+to+audio+receiver PDF link annotation
    • https://demifezi.weebly.com/uploads/1/3/1/3/131379940/buroduvalepavew_silewasaja_gerojibavedeki.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/ioaQieI/hard-_boiled_meaning_crime.pdfIn PDF document text
    • https://cdn.sqhk.co/kutogudofi/jgjiBmu/nuxoxexigexadudaziwijegot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_5fe22363e26cf.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/kelajepusojiw_tevelinaxoxax_fulitu.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/rerefoniki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_6003bee65e523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fd77a0fb17fb.pdfIn PDF document text
    • https://vowodilob.weebly.com/uploads/1/3/4/6/134697463/mulasu_vusebuwuv.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/nodex_kemagufapo_pelokuvupif.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/ehdhb79/country_music_80s_and_90s_download.pdfIn PDF document text
    • https://cdn.sqhk.co/perolurowona/0MicvKk/kevaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_601d157329c4c.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/how_to_use_crane_drop_humidifier.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/cirque_du_freak_darren_shan_summary.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/mawesenasijoser/334970045.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/self_adhesive_laminating_sheets_how_to_use.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/code_of_canon_law_1917_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/the_exorcist_legion_vr_complete_series_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/answer_key_for_12_quarterly_exam_2019.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_off0000fac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC9 5568 bytes
SHA-256: 9182018c3a7da6656dc57b8790ce7b921d8f08ad2978864fe3cf8a9670a0658b
font_01_sfnt_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 10544 bytes
SHA-256: 045d286f599734dc188acc04f43aac483846cf14f8546ab1f5062f6a199ab8a3

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