Malicious PDF — malware analysis report

Static analysis result for SHA-256 d515198ac31e826e…

MALICIOUS

PDF

77.0 KB Created: 2021-02-26 02:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a3bbc1354a8167dc137f28539d5f7335 SHA-1: 40590d1642e9a47a714db43a4a79f4d81667a993 SHA-256: d515198ac31e826ec5956032eeab94cbf5fb4beb927cdb793ac8d1a17de4ff0a
192 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs and the 'SE_URGENCY_LURE' heuristic suggest a phishing or social engineering attempt to trick the user into visiting a compromised site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=final+walk+through+before+closing+checklist In PDF document text
    • http://meetsucre.pro/69173244503uppey.pdfIn PDF document text
    • http://stopnutristrike.ru/xaxujoliremevizokomvjm3k.pdfIn PDF document text
    • http://stickerrus.ru/general_chemical_structure_of_olive_oil854ix.pdfIn PDF document text
    • http://com-copyrighit.com/how_does_the_rich_stay_rich24pxm.pdfIn PDF document text
    • http://salea.site/jetaji0fyum.pdfIn PDF document text
    • http://demumamudu.22web.org/zexosapirixidugezenaluz.pdfIn PDF document text
    • http://reassurez-moi-fr.info/address_in_spanish_formgk53w.pdfIn PDF document text
    • http://alexandreablog.com/informatica_etl_developer_tutorial2ndjd.pdfIn PDF document text
    • http://skidki-day.store/db_legends_mod_apk_1._36._0qjsds.pdfIn PDF document text
    • http://save50it.info/attack_on_titan_season_3_ending_song_downloadlinvh.pdfIn PDF document text
    • http://autocredit.moscow/baritone_ukulele_chords_chart13g2v.pdfIn PDF document text
    • http://fabermanufacture.ru/bum_bum_bole_song_pagalworld_320kbpsbf4km.pdfIn PDF document text
    • http://life-news.tech/wabilobar3w1vv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagiwabiluwotel.epizy.com/mft_exam_2_answers.pdfIn PDF document text
    • http://miwetiguv.epizy.com/how_to_get_rid_of_dark_acne_marks_on_face_fast.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/cain_software_for_hacking_free.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_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 5392 bytes
SHA-256: 1fdfe884b99457817b328e86e0e6004ead98a580436d164011ba8b4ac11cb02d
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 10300 bytes
SHA-256: f77252ad7ae0d55da99ff7126c4e9cdbe45242c80b40a674b9bde2c679344b8f

Open this report in the interactive analyzer, or submit your own file for analysis.