Malicious PDF — malware analysis report

Static analysis result for SHA-256 e330b187f54dc1db…

MALICIOUS

PDF

72.3 KB Created: 2021-01-21 18:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2b5dcccdf9cc68b94762b2310b390714 SHA-1: e9474631ea7a76c9cd83025d173940335e490e33 SHA-256: e330b187f54dc1dbdc637ab3b3458ac7083b390349d8212020df114af4478b23
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains strings that suggest a lure related to 'lab answers'. The embedded URL 'https://jottigo.ru/123?utm_term=4.2.4.5+lab+answers' is a primary indicator of a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself likely contains malicious JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=4.2.4.5+lab+answers PDF link annotation
    • https://site-1177159.mozfiles.com/files/1177159/movie_catalog_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/gejde69/xutixig.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/gcgcum7/tusizakezin.pdfIn PDF document text
    • https://cdn.sqhk.co/jasekazus/fFjfhba/femaxawukesasaperetoge.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/zagubip/cisco_dwdm_sfp_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/free_24_hour_weekly_planner_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/bed_sheet_set_double.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/dejireguvidosuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/disney_channel_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/set_theory_venn_diagram_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/camouflage_rapper_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/countries_capitals_and_currencies.pdfIn PDF document text
    • http://suwojubomitela.epizy.com/bombay_movie_songs_ringtone.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD384 4744 bytes
SHA-256: 0fcc280cf0f4dcb537fb1bb827bad1b18b94e2a69b1cd050dbb6131ceb173be1
font_01_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 10196 bytes
SHA-256: e539676f35bb30311a41ab140374218d50d0d0d0e13370a4fedac8d4c801aa53
font_02_sfnt_off0001069e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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