Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ceb3b2716a43e16…

MALICIOUS

PDF

91.0 KB Created: 2021-01-18 03:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a6cd694082803f227fd556f6a4faaaa5 SHA-1: 488a66dcd236f68fb0068dfe49ab1d45a6095052 SHA-256: 6ceb3b2716a43e16a73501391451018863cdb25d2fba48f12d681a9702b10a14
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure, further supporting a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/123?utm_term=reflexiones+sobre+el+amor+al+projimo In PDF document text
    • https://cdn.sqhk.co/wazuvegox/bgcBpia/blackpink_lyrics_offline_app.pdfIn PDF document text
    • https://site-1184900.mozfiles.com/files/1184900/8088528615.pdfIn PDF document text
    • https://site-1172118.mozfiles.com/files/1172118/watermelon_radish_nutritional_information.pdfIn PDF document text
    • https://site-1168003.mozfiles.com/files/1168003/79059434108.pdfIn PDF document text
    • https://site-1239972.mozfiles.com/files/1239972/puxamiloguxelonibe.pdfIn PDF document text
    • http://lidedapomegila.iblogger.org/quartz_micromachining.pdfIn PDF document text
    • https://site-1172855.mozfiles.com/files/1172855/zubisapuvetiwufi.pdfIn PDF document text
    • https://site-1167961.mozfiles.com/files/1167961/kong_want_banana_gorilla_game_download.pdfIn PDF document text
    • https://site-1178351.mozfiles.com/files/1178351/xiwugizasuwuremajo.pdfIn PDF document text
    • https://site-1203095.mozfiles.com/files/1203095/dino_sim_auto_clicker.pdfIn PDF document text
    • https://site-1178803.mozfiles.com/files/1178803/64548723391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/zelda_minish_cap_kinstone_guide.pdfIn PDF document text
    • http://pagupim.epizy.com/8090992674.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/synonyms_exercises_advanced.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/jeppesen_general_airway_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/96760283375.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/dekefotuk.pdfIn PDF document text
    • http://mowesedapi.epizy.com/15788621540.pdfIn PDF document text
    • http://dipuvomefig.epizy.com/15466661543.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11754 5044 bytes
SHA-256: 87fd57ef413010f60c3502fb634b4881996f0d88836c512edc154cf860dddfca
font_01_sfnt_off0001285c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 11888 bytes
SHA-256: 8428f443bd8e40bd6169b81b82c31f08074a84c97173cfc48c9f49c42f40f1b0
font_02_sfnt_off00014eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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