Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0793cf35a33e0f2…

MALICIOUS

PDF

74.2 KB Created: 2021-06-05 12:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f029945990e81c44f0c7f0040eb4c18 SHA-1: 726404a44ed0dc9b9cb227e919210e701eaf672c SHA-256: f0793cf35a33e0f2f94488eacc0141c4c50a740d243a829b419c1f1a4b5d7aa6
144 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of a phishing lure, including a fake CAPTCHA prompt designed to deceive the user. It contains an embedded URL that likely leads to the download of a malicious payload. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/pbw?utm_term=download+super+smash+bros+ultimate+for+android PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/200973c9-c5ce-4c0a-b17a-8d8706c054f8/fegelarevodijazufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77d3f0f-d853-4291-84ba-0905307795e7/85633267622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa548ac5-7dec-4dbb-a07a-a314c7376fc9/59881425523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dbcf985-175b-4dc7-a9e8-0c6fa4efa1de/steps_to_become_a_general_contractor_in_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f246b638-546e-45ac-818d-68fdc967a2f6/29173355985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a4a322-42fd-4bba-9b72-4de971c54e63/angels_and_demons_dan_brown_novels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06690d9-6ccf-43f9-a674-ef3f438fe443/monmios_e_polinmios_exerccios_resolvidos_8_ano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a383df51-f9bb-410f-8f5b-81840180d7d2/56245697948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b0f92b-d725-41cb-9e51-c8468e8ad916/xapap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3008b61c-fb84-49d0-8a9e-fcbb61e2d3ad/megomukix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04cdef5-ad31-4561-8088-8890e785db69/dracula_book_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cd874c-dfc3-4a14-828f-d7c07c54808e/38499751304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4a1c7b-94fa-42db-bdb6-7de0c76a2f6c/mitagogufadiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8622ae92-c077-4580-9cd4-bb5af4cb8282/88327420065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a21f79-f141-4350-a92d-f2c3204eeb1b/41653320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da263300-227a-4afd-bfac-d9f277b10d53/pogrom_oxford_english_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af0db4d-3e4b-4e4c-b537-94ec75d096d7/what_machines_at_planet_fitness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e9c215-d007-433d-96f8-f99f432fcded/suxujijix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbe2949-3c2b-4c29-a891-8f14a0f19145/blink_book_review.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5512 bytes
SHA-256: 8a04345c0e6202626e84e97710926ce148f045c991a2ac5449ca5a5d02a76430
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 10760 bytes
SHA-256: a8463b40d7f5310400571b3b95a4ab7d81295d3ec098c73cfff2f0c648b0b4f8