Malicious PDF — malware analysis report

Static analysis result for SHA-256 d919f4aac589e627…

MALICIOUS

PDF

537.2 KB Created: 2021-04-08 00:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 186669f2d49141c6a918233359b83548 SHA-1: 7a6b23a14d0fd12a46b8bf23c33f2c1233930d99 SHA-256: d919f4aac589e627d7b570cab6f72a0eb29572403c6c8f2a47f65ae70f8ecbbb
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document that employs social engineering by luring the user to install a browser extension or update to view content. This is a common tactic for credential theft or malware installation. The presence of multiple external URLs suggests the document is designed to redirect the user to malicious sites, likely to download further payloads or initiate phishing attempts. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8329

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://druttle.ru/wix?keyword=lego+batman+3+apkpure PDF link annotation
    • http://nufapivevavenak.22web.org/pamevemalozonok.pdfIn PDF document text
    • http://salebox.shop/nelowitibukobuparokadeatpv.pdfIn PDF document text
    • http://guzumakemos.iblogger.org/brain_teasers_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/BhjPMp7/do_you_want_to_play_tennis_in_french.pdfIn PDF document text
    • http://jiviruke.iblogger.org/kizubowatexuwuxawelezem.pdfIn PDF document text
    • http://rakuropa.iblogger.org/59043455395.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/milk_and_honey_book_free_downloakzpty.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/jiij1MM/best_space_flight_games_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/jA5j0LS/ballsy_meaning_urban_dictionary.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/fSyghif/bose_wired_noise_cancelling_headphones_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/hbiaRia/hillside_drive_mod_apk_happymod.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/igoHif9/best_nikana_prime_riven.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://rerezedosal.rf.gd/xoxanavox.pdfIn PDF document text
    • http://tisudaxutuz.epizy.com/brocade_fabric_os_upgrade_guide_7._2.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_378acb1214a44e1dbb80ea3f5d37edb1.pdf?index=trueIn PDF document text
    • http://lodibepaw.epizy.com/brother_printer_hl3170cdw_drum.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/5454563935.pdfIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_a300b645301d486ea4d2c88bc1bb4a8d.pdf?index=trueIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_1c266ac135fe4064a571d499e040aac3.pdf?index=trueIn PDF document text
    • http://bozexobasunuz.rf.gd/computational_complexity_a_conceptual_perspective.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_013_off0008284d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8284D 23468 bytes
SHA-256: cee01b94863e49b8a52e587eff6bc39d2e9889439d1122618e61040f746d7b55
font_00_sfnt_off000716af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716AF 53860 bytes
SHA-256: 97a714e1b54964bdff9649589ebe3f58c13cbb3aedd6585f0e7c7a2ce9fecd8a
font_01_sfnt_off0007bb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB51 5240 bytes
SHA-256: 08374fdb90caa0bc89d47f19044b4a5087958824dec29b24b019de272d514521
font_02_sfnt_off0007cd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD18 3092 bytes
SHA-256: 8663d8119b9040c3abda8619ad382d661ee75f9ae410cc7c9f2936ebb77d1362
font_03_sfnt_off0007d937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D937 30124 bytes
SHA-256: 175507ae5036178e4a025a63a82394ff555a44a2f589d5babed42bd9178aef7f

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