Malicious PDF — malware analysis report

Static analysis result for SHA-256 8539cadff1adc4fe…

MALICIOUS

PDF

93.3 KB Created: 2021-03-21 22:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee4bc8b256f84635a4f0c06fdef3d03 SHA-1: dc19ab5b72448b2a2ece4e2f4efe4eb93d7152bd SHA-256: 8539cadff1adc4fe501b49db6cbdfa3716e20417b24349afee4de7769e0a247a
156 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 phishing attempt. It contains a mass of external links, with the primary malicious URL being https://resalured.ru/strik?utm_term=how+did+the+colonists+govern+themselves. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous links suggests an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://resalured.ru/strik?utm_term=how+did+the+colonists+govern+themselves
    • http://mowefopovog.mywebcommunity.org/is_road_to_hana_dangerous_reddit.pdf
    • https://cdn.sqhk.co/zagakobafot/WgdcNsB/shareef_badmaash_movie_song.pdf
    • http://dotugigobeje.iblogger.org/saccular_vs_fusiform_aneurysm.pdf
    • http://vuzetasavuxoso.mygamesonline.org/1930621061.pdf
    • https://cdn.sqhk.co/wotabefej/mjdc9hg/68460904183.pdf
    • https://cdn.sqhk.co/puxolika/iadhjhc/71361642619.pdf
    • https://cdn.sqhk.co/zirizowesaw/bidjdEI/skyscraper_lyrics_by_demi_lovato.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_818ad1b5c00d4ad6af7016607daf6fd1.pdf?index=true
    • http://radiviwix.onlinewebshop.net/framework_for_ethical_decision_making_in_healthcare.pdf
    • http://linakagiwabofa.epizy.com/59466742453.pdf
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_b2c6254d50b641fca68c6556e3baa5db.pdf?index=true
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_d0b8a900d4b84267b241a73b802208ff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0005dbd7-d59f-40cb-9297-54af92f0d45e/28950148632.pdf
    • https://uploads.strikinglycdn.com/files/eaefaade-ae65-4bcf-9b7d-1e86c42902a3/best_sewing_patterns_uk.pdf
    • http://batogejupimole.rf.gd/sobifebesixazuviletaxi.pdf
    • https://uploads.strikinglycdn.com/files/cef3cabc-bac7-4b50-9cfa-e64dbb6eccdf/governor_of_poker_2_cracked_apk.pdf
    • https://uploads.strikinglycdn.com/files/a77eea26-7fc1-4158-8398-fcda0c84154f/acer_aspire_v5_touch_screen_price_in_india.pdf
    • https://uploads.strikinglycdn.com/files/222d5ba2-a577-4d4b-b9f4-b8007351632c/articulos_de_la_constitucion_politica_mexicana_que_hablan_del_medio_ambiente.pdf
    • https://uploads.strikinglycdn.com/files/09943449-9ac4-48a4-8e04-cf8e1eb8edc2/2003_ford_focus_engine_diagram.pdf
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_c87a51c5c87044aca5cd313bc7ff176c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ec3f1a84-675b-4bfb-b1d6-a73b919f8dcf/354764521.pdf
    • https://uploads.strikinglycdn.com/files/a5219579-e995-4a78-b72b-15e0008541a1/delta_4_in_1_crib_reviews.pdf
    • https://uploads.strikinglycdn.com/files/a37f513a-e4e6-4854-9439-3dbc4b266969/the_devops_handbook.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130ee.bin
45f2d72058bb81aa013e391b6d3a4c652bcc7ee2e6a85858a02fe4a8ae86b91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130EE 5256 bytes
font_01_sfnt_off000142bb.bin
15397ebe75dbd1886876559fa8e31fde7bbb9a61c8e35192d4d156680ee88d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142BB 10732 bytes

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