Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd35274f38277c1b…

MALICIOUS

PDF

86.1 KB Created: 2021-04-09 09:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f393bc7ead4125729043700574c12e96 SHA-1: 238605a95bcf1eba26c9c27c8ca6f0eed1da3bf2 SHA-256: dd35274f38277c1b5008297ddfb45d8cdd162163473285ed01427b95879e22b7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'The wanderer anglo saxon poem analysis'. The presence of multiple external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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://lozipotod.ru/strik?utm_term=the+wanderer+anglo+saxon+poem+analysis PDF link annotation
    • http://zevupixikug.mywebcommunity.org/mopuzusovopimasenuzifufa.pdfIn PDF document text
    • http://rafupufubed.mypressonline.com/xatujubofigiborezowaled.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/wingspan_board_game_rules.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/tp-link_av500_tl-wpa4220kit_manual.pdfIn PDF document text
    • http://zimejitudik.iblogger.org/76946384033.pdfIn PDF document text
    • http://load-bcp.com/notigago5prw0.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://wordwild-store.com/bovesewibogujeginiwivvwez.pdfIn PDF document text
    • http://sellamorem.com/movies_free_app_for_pcgpo55.pdfIn PDF document text
    • http://floradoma.net/53949239770n2lil.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/buku_akuntansi_biaya_riwayadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepagewav.atwebpages.com/betavowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab364b3-93d6-4537-b642-5b7b77c94b95/10490981592.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/fidefemalov.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/ambili_malayalam_movie_2019_song.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/5632231248.pdfIn PDF document text
    • http://gojejamajutemus.epizy.com/89316210368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd5e8b7-246c-41bc-bbed-72d9919e15f2/2161609488.pdfIn PDF document text
    • http://javolijokexike.epizy.com/41413158395.pdfIn PDF document text
    • http://duzatip.rf.gd/hpi_baja_5b_parts_list.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_off00011054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11054 5584 bytes
SHA-256: 638c22cbce02a21cd96beafe85195e96ece5471b4a31410103f65791887164f7
font_01_sfnt_off00012345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12345 11224 bytes
SHA-256: a597728c510b5c0172f74c6182989a535d8f9b0ea9d59564381d48c1824055e3

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