Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe86b20b1206aff…

MALICIOUS

PDF

81.9 KB Created: 2021-01-13 15:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: efee4fe8560c37fc39f9e542af054dae SHA-1: 999c2f5a6fb42d30ea304b67addc5e4093b6324c SHA-256: 4fe86b20b1206aff4606cef71b991e899846eb570a0c63a4a6efc266149c5a81
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL, 'https://traffset.ru/aws?utm_term=lotro+crafting+guide', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Lotro crafting guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=lotro+crafting+guide PDF link annotation
    • https://site-1174832.mozfiles.com/files/1174832/christian_coloring_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/jjfigij/kifage.pdfIn PDF document text
    • https://site-1220888.mozfiles.com/files/1220888/zetotivabirabuw.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/1364585670.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/0igiaif/vodazujanafepetezap.pdfIn PDF document text
    • https://site-1168130.mozfiles.com/files/1168130/fast_food_cooking_restaurants_hiring_near_me.pdfIn PDF document text
    • https://site-1175796.mozfiles.com/files/1175796/1794450786.pdfIn PDF document text
    • https://site-1173985.mozfiles.com/files/1173985/roku_tv_setup.pdfIn PDF document text
    • https://site-1168034.mozfiles.com/files/1168034/netboom_play_pc_games_on_mobile_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/ichdhbU/gatifafogegaziwaf.pdfIn PDF document text
    • https://site-1177565.mozfiles.com/files/1177565/bike_race_in_italy.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/firigugixujotov/network_analysis_arcgis.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/analyzing_ecological_relationships_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/lutojorabogiwitinexi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/kiworimedupajemomekumul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 4920 bytes
SHA-256: 4eec204fc24aa3cb4e867aa9ab8f00c77638e76275065bb3e8da2ff8b87e338d
font_01_sfnt_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 10740 bytes
SHA-256: 1e9cc650a67496e1c33a1ce759a667b3f43177dc4053d529698f6dde3d6583ef
font_03_sfnt_off0001240a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240A 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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