Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c743f42e6a335a…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 00:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 313090eb25c9c503967fdf8a6275bd53 SHA-1: 965a46ef0446860cf65bb052e0625b5b66b1ad46 SHA-256: 65c743f42e6a335afd4566590afe03e66c4d6c2fa4dbda1c44e2a466f90f012b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". The document body, though heavily obfuscated, suggests a lure related to "Lord of the flies important quotes chapter 4", which is likely a tactic to attract clicks. The presence of multiple external URLs, some with unknown reputations, indicates a potential for redirection to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-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://zajinet.ru/strik?utm_term=lord+of+the+flies+important+quotes+chapter+4
    • http://detonic-de.website/how_do_you_fix_a_sewing_machine_that_keeps_jamming_brainlygyey5.pdf
    • http://abistrans.ru/how_to_connect_2_dj_mixers_togethercae1v.pdf
    • http://ezfix.asia/guess_the_song_80_s_hits_answerscj077.pdf
    • http://getfreecreditreport.info/what_is_the_difference_between_milwaukee_m12_batteriesdbu99.pdf
    • http://smartcoin.design/warefovanuxebevafemowopd0jpf.pdf
    • http://tehnotop.store/facebook_app_install_free_mobileicb6m.pdf
    • http://cherrypimp.online/how_to_make_bat_stickers_at_home_easyqpu8z.pdf
    • http://kugenezajiz.22web.org/biblia_latinoamericana_nuevo_testamento.pdf
    • http://edayafar.xyz/uv-5r_vs_uv-5r_pluszdxkg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gepijelemerafin.rf.gd/bitcoin_mining_explained.pdf
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_3d6728600006445691aa2cc8493e54c2.pdf?index=true
    • https://af6bd0e1-9fb2-4c52-b6e5-df6188d17e94.filesusr.com/ugd/771d18_a5a684c1f53e4333adc114a9db272ab5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/32d804fb-b50a-403b-806e-2c12c2c257a7/riwotuseruribo.pdf
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_3671db1dd8d243e9a6dd5cb638898d8b.pdf?index=true
    • http://gepikadagutuv.epizy.com/18221794760.pdf
    • https://uploads.strikinglycdn.com/files/c2f07225-9ffa-4b3c-96fe-3e440019971b/test_de_temperamento_de_keirsey_online.pdf
    • http://fovenipeder.rf.gd/guludadixedij.pdf
    • https://uploads.strikinglycdn.com/files/febd6543-60c5-4151-8230-de2dc97244a6/kenmore_elite_he3_washer_parts_diagram.pdf
    • https://uploads.strikinglycdn.com/files/d7088be1-0038-4f27-ae23-edd8360ab039/3511813095.pdf
    • https://uploads.strikinglycdn.com/files/838c8d07-925e-40c0-b1b9-ad2392b799bf/komovexadub.pdf
    • https://uploads.strikinglycdn.com/files/198ea16b-0fe0-475c-9d5a-d5ddfe3ede56/31322949623.pdf
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_5a3dc992238346e99bddfc90b325335b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e25ca313-610d-4110-825d-7f982cad3d32/69399785062.pdf
    • https://uploads.strikinglycdn.com/files/0c29827f-a402-4656-9991-c25b89f5eefd/31622066090.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_off00010038.bin
bfe8e769736dea6fa7c63c9eb262c52b85188febea5843e4f96896ce44a239bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10038 5552 bytes
font_01_sfnt_off000112f2.bin
bc1a50d63b8256772ad1279c36acc0b56d7502c329bef0ca1cb6dc87ec4442de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F2 11212 bytes

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