Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4093a7d44da366…

MALICIOUS

PDF

75.0 KB Created: 2021-02-27 17:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 39a56eb2d30d05121be1be0b611c3063 SHA-1: 5eacb1ff617624d86e7ba2d31017e263a58c86a5 SHA-256: 1f4093a7d44da3665859a340ba3a5ef9925a3f8458a571979fe57531143226fa
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains text related to fire alarms, suggesting a lure. The presence of multiple embedded URLs further supports the malicious intent of directing users to potentially malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=why+is+my+fire+alarm+beeping+even+after+changing+battery In PDF document text
    • http://fanisore.sportsontheweb.net/sawidenudewobip.pdfIn PDF document text
    • http://cosmicgig.com/vogelupalememekewakivuvevmxj6x.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/symbol_barcode_scanner_ls2208_programming_sheet.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/99701392450.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/SdkAKVc/onedrive_password_manager.pdfIn PDF document text
    • http://onenature.space/arkham_horror_card_game_deck_buildingn82pp.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_to_use_mini_keurig_machine.pdfIn PDF document text
    • http://1cats.space/mobile_charger_circuit_diagrame7in4.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/ggjgd69/natabol.pdfIn PDF document text
    • http://rawenspant.online/super_fowlst_secret_charactersgb0ou.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/livivuvuwugeb/judgement_batting_center_guide.pdfIn PDF document text
    • http://wuduzukatej.epizy.com/benitanunuli.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/taxufepepawewowatixif.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/guidelines_vascular_access_dialysis.pdfIn PDF document text
    • http://nabobaze.epizy.com/rilutonepopezakuv.pdfIn PDF document text
    • http://jusiwanemil.epizy.com/drain_the_ocean_video_questions_answers.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/17887086712.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/id_card_template_psd_file_free.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_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 5744 bytes
SHA-256: c1c5eb96b21b752bee20f17fc24b6f999bd904f8ce02ffc4d65339d550faaa88
font_01_sfnt_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 10476 bytes
SHA-256: a91b00e7db08b3fe35a7faefa175c4c2359dea037985d75028e3953a1a72421c

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