Malicious PDF — malware analysis report

Static analysis result for SHA-256 3545b7b7023be390…

MALICIOUS

PDF

87.4 KB Created: 2021-03-15 07:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cc33c345b7cd9bd9e92444692a8638dc SHA-1: 7f0c7e5f319c9f32c38556251df902ecb509d72e SHA-256: 3545b7b7023be39087925c363fe4abbca98e622a5c9a1b8eb756dccf25e80453
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://crophysi.ru/strik?utm_term=0.5gallon+cool+mist+ultrasonic+humidifier+with+aroma+white+-+homedics+cleaning PDF link annotation
    • https://cdn.sqhk.co/jupozaregu/g3ihTja/2021_early_release_free_color_tunnel_birmingham_al.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/t3heevi/the_culture_of_narcissism_barnes_and_noble.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/qAciikI/30723811492.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/4Q3CtbW/status_video_download_telugu_share_chat.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/gawagunikuw/In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/chunkzz_movie_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc10920-523d-4bf8-9a82-05750add6d90/vukadariroves.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/vaxakujer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01102f5f-8503-4bb8-9217-a7f484a65e0d/39985604384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7e1b15-9128-48bb-9124-9f8ff320ff3c/pokemon_fire_red_speedrun_guide.pdfIn PDF document text
    • http://naremijex.epizy.com/monthly_calendar_planner_template_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28967471-22be-4599-a8db-5473cec9a52d/how_to_train_your_dragon_book_11_and_12.pdfIn PDF document text
    • http://matefurixexa.epizy.com/datuluviji.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/wunonapimozuxexidanaxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/91151096785.pdfIn PDF document text
    • http://manovubiludigi.rf.gd/why_is_the_curl_of_a_gradient_zero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/925ccbf3-646e-4ae4-9196-571f6782bc47/38957297322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7bbc644-0bb3-4322-8198-d5703178604c/why_isnt_my_ipod_nano_turning_on.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/java_for_dummies_7th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/18487532330.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/78251541232.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/french_learning_books_free.pdfIn PDF document text
    • http://nonogopikizezed.rf.gd/46734269773.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/enduring_power_of_attorney_template_queensland.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 5644 bytes
SHA-256: 710c8354b691759272c71693726d1cf80092cf1fc31bcd3c92e2a486764038c5
font_01_sfnt_off000118cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CF 11796 bytes
SHA-256: 65992fe10bdf7469b0fa26b12710e8687544190d3b1ac012dea13edbcec5b0a4
font_02_sfnt_off0001410e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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