Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f16951ad9ab8fd…

MALICIOUS

PDF

78.5 KB Created: 2021-03-17 19:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f9dc96c9f9f4bde17fdee40e1b07d6c7 SHA-1: 9cca1ad2a08d3e8396ddb0cc076e21b88a4f3722 SHA-256: 38f16951ad9ab8fd44a367e08edbc1c9a6a79957626a8a1ae8c6c2eec10ecaf8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, indicating it was likely generated programmatically. No scripts were extracted, but the presence of numerous external URLs points towards a malicious intent to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=what+is+the+significance+of+the+title+the+road+not+taken PDF link annotation
    • https://cdn.sqhk.co/lomasamube/eKHibhH/dumb_ways_to_die_game_1.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuzodopuvu/gdPhhje/smart_train_measure_i_results.pdfIn PDF document text
    • https://cdn.sqhk.co/mubogasaven/bjcBNhg/free_music_download_sites_for_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/jgAggSk/smash_tier_list_2020_october.pdfIn PDF document text
    • https://cdn.sqhk.co/sepexapubu/hhhjjEV/online_shooting_games_battle_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Xjjhfye/voberuzewumetugiwavaduko.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/jcSjevV/clueless_tv_show_streaming.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_0ced5ed78bb74f37951db3a249b20662.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_41ff6d6161834d388c1b44555f98c46b.pdf?index=trueIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_370ebd475eef40418c68594c4db5be5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/491e3826-a5ac-4318-9170-1589b6ff8167/the_elephant_man_play_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edce4c2d-62f0-4767-96af-1bda5a722399/38240604336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea0007f-48d8-4e2c-90b8-ac2e82d9f200/alkaline_herbal_medicine_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7530e28-9c46-4740-b997-0324bcd103ee/polaris_360_pool_cleaner_manual.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_0cca3aa6dfee4d39b543b991ee966814.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0697c488-b04d-4f4a-8dee-83f92acd8f44/sisterhood_is_powerful_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bceffde-320d-43d1-a7dc-e6f5743727a0/doss_wireless_bluetooth_speaker_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4367ca14-aa7d-45ce-aaab-74d919315dc4/tp-link_av600_nano_powerline_adaptor_starter_kit_tl-pa411kit.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3C 5360 bytes
SHA-256: ae445221eadd3030363498fc32becfd31c6c90d99235dbfc8131fe4a39302afd
font_01_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 11496 bytes
SHA-256: f557f1b72d16034431da05c9d3be8bec1406ea2382f6f9eb4008e0274bb4114f
font_02_sfnt_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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