Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51e9e1fd3d5804d…

MALICIOUS

PDF

78.0 KB Created: 2021-02-28 02:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10a3fd7dfc8d892aec3b5e021525182b SHA-1: 9be28fc699799a7f0beb3a4cdd44c4f98d98d270 SHA-256: b51e9e1fd3d5804d6fa107e4195a26de524d22a4e2774039110ce58412ac583b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://nipisod.ru/wb?keyword=par%20quoi%20remplacer%20une%20feve PDF link annotation
    • http://ductsunlimitedins.com/88153282184c5jmu.pdfIn PDF document text
    • http://virnet77.ru/fodorepemifexemedarehqygv.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/o1tgc8O/virus_worm_zones.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/jhcMhgi/undertale_wallpapers_iphone.pdfIn PDF document text
    • http://swiss-gear.store/mekaxelutomujitgk72.pdfIn PDF document text
    • http://robertferrell.net/catalase_experiment_data_answersp3l9n.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/jidjcig/vosobebav.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/51832632258.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/idjgijE/syfy_tv_series_on_netflix.pdfIn PDF document text
    • http://theporte.xyz/samsung_bd-j5100_firmware_updateciwoh.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/dremel_multipro_model_395_manual.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/palikuvexake/bose_earphones_wireless_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/app_china_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/kasabekufudufuvotilovuve.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/dragon_ball_z_android_17_returns.pdfIn PDF document text
    • http://benamow.myartsonline.com/what_is_breach_notification_rule.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/adviser_platform_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/aladdin_cartoon_full_film.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/greedfall_romance_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/coat_of_arms_blank_shield_template.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_off0000dd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD35 5168 bytes
SHA-256: ad5cb40ae81919757f1c47b1ad4a1b500c92d3f3a938f2f519d4b7f92c9d3b51
font_01_sfnt_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 11796 bytes
SHA-256: 965fcb5fcf9a949699af77d480b45eafeec36721b57ec40896e5d5ab9aeff174
font_02_sfnt_off00011428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11428 16132 bytes
SHA-256: 6f1ff871cf6f8a11a72652b45576c366cdb39a1ef29e9eb747fa7a572d777da9

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