Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8be6c9aa434ac9…

MALICIOUS

PDF

72.7 KB Created: 2021-02-23 07:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6f65fbe91f63fd48d035cbff2ed96615 SHA-1: c9ae9f5826427b9bfce4fe93e1bb1528bba8f70d SHA-256: 2d8be6c9aa434ac948e3bfc00b7c2d8fbdf04e6fa17ebab7a2dc39786cb5600f
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of malicious URLs is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=the+power+of+now+book In PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/bomas.pdfIn PDF document text
    • http://gasomenuza.iblogger.org/tajoduvegul.pdfIn PDF document text
    • http://xojitufos.66ghz.com/metetotasuvojadesu.pdfIn PDF document text
    • http://erogan24.website/similar_triangles_word_problems_worksheet_answer_keyaiqmx.pdfIn PDF document text
    • http://jogegeve.22web.org/46996652937.pdfIn PDF document text
    • http://freshmind.net/89324529046y1zeq.pdfIn PDF document text
    • http://skywonder.space/mmd_model_maker_downloadtzltj.pdfIn PDF document text
    • http://letnesil.xyz/english_grammar_tenses_examplesygjeu.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/fulizapo.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/tegutosexurai97f1.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/metakibeme/nevar.pdfIn PDF document text
    • http://tuxefefili.epizy.com/jefedobomamoxajopezud.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/dame_cicely_saunders_books.pdfIn PDF document text
    • http://zasegusof.epizy.com/vcenter_client_6._7.pdfIn PDF document text
    • http://tukutuxobolekub.epizy.com/frozen_movie_in_tamilyogi.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/breville_tg_870_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/windows_10_feature_update_1709_offline.pdfIn PDF document text
    • http://gatoruvizuzil.epizy.com/angles_on_parallel_lines_worksheet_tes.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/komipuvetifurep.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 4812 bytes
SHA-256: 6a8b86b19f773dbb1fc0c6b88a19ad816ced7295f4385e33f1e14248fc2d9cea
font_01_sfnt_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 10468 bytes
SHA-256: 420222bff46eb72a33bb10c925debd324e77bd69c06b1add4102403b23edd58a

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