Malicious PDF — malware analysis report

Static analysis result for SHA-256 9088bce5aa0f0241…

MALICIOUS

PDF

74.7 KB Created: 2021-02-24 06:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35d5c4e8ee3280c02cb7940ea67efd8a SHA-1: 9cb6dcf2baa59fd3a889badb59c59ef0b4490ad6 SHA-256: 9088bce5aa0f024187c153112006652e06b7a85f3e81099ce18297607600fb03
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting services and appear to be part of a link farm designed to obscure the ultimate destination. One prominent URL, https://jacksth.ru/strik?utm_term=xbox+one+pdp+controller+mic+not+working, suggests a phishing or scam attempt related to a common gaming peripheral issue. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jacksth.ru/strik?utm_term=xbox+one+pdp+controller+mic+not+working PDF link annotation
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/5259067.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/8814dce89b52.pdfIn PDF document text
    • https://vudelugofede.weebly.com/uploads/1/3/4/3/134383428/4626486.pdfIn PDF document text
    • https://cdn.sqhk.co/posogamumut/ULhbgjA/miwefuzepetak.pdfIn PDF document text
    • http://itrom.fun/electrochemistry_practice_test_with_answersem51w.pdfIn PDF document text
    • https://bopuxokefira.weebly.com/uploads/1/3/5/3/135300507/e7b3a.pdfIn PDF document text
    • http://marketitaly.pro/kanaa_hd_movie_tamilgunzxmn6.pdfIn PDF document text
    • http://itwomen.space/data_abstraction_problem_solving_with_c_7th_editionjrb2d.pdfIn PDF document text
    • https://cdn.sqhk.co/ropesuzuruf/EhjQaLu/subway_surfer_unblocked_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/VNgdihh/41103272590.pdfIn PDF document text
    • http://milano-moda.space/104447356494pgfu.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/8925667.pdfIn PDF document text
    • http://nigasheff.xyz/paint_tool_sai_1.2.5_full_downloadtlv0x.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/SNhcAXE/gofibufena.pdfIn PDF document text
    • http://podarokinsta.online/87835145117yxx0l.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/bhcD6hj/pekurunizomuritid.pdfIn PDF document text
    • https://xunaliniwer.weebly.com/uploads/1/3/1/3/131398540/47fac94a.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/kigavanus/heaven_s_vault_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/bandish_all_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/77922010424.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/aaa_title_android_games.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5344 bytes
SHA-256: 20bfc21ce84840c2a185d01308ddf6bca28931aceeb49c8d49543b2824fa9f0a
font_01_sfnt_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 10540 bytes
SHA-256: cd016c81dcf03666aadb11b6fbaac86936fc374706fd60ec15e9e3601f74bdf2

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