Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f9d41a2529acba…

MALICIOUS

PDF

76.6 KB Created: 2021-03-10 17:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c0f017c10084583c0db6d32bf47314d SHA-1: a605bbd3ba50847418c5e4345374f3d05ff08da5 SHA-256: 53f9d41a2529acbac41e8d8616d03014147a6a7e714c35b0db3fc869abd7c113
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and the heuristic for a download button suggest the document is designed to trick the user into downloading a payload. The document body, though partially corrupted, contains text related to downloading a game, which serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=download+strike+force+heroes+3+offline+for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456666/normal_5fefb81e25a46.pdfIn PDF document text
    • http://jewigekavevexi.22web.org/jegozizavexalobuxule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_603f24a7e4a47.pdfIn PDF document text
    • http://nojejolewowutes.22web.org/remains_of_the_day_corpse_bride_piano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5ffda7125a103.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/titugome/grand_chase_mobile_newbie_guide.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/43541723288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df6f267-1145-4d16-960b-77740ee50390/shakespeare_julius_caesar_brutus_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72a45ae-af29-4c45-9816-3df714d30612/34242929985.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/pan_card_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/rupibogatatalubakimuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813af5bb-7990-42b2-9dc2-00a79ed6f947/66276815689.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/resolepipokejedeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c10f8db-5553-43c9-b790-e691ed6b9b89/harry_potter_2020_official_trailer_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb001fea-eb93-4873-8a42-d231f5904e0f/71366777933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c4e97e-3f9e-45c6-946c-1cccc8a0b085/schwinn_womens_riverwalk_26_bike_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8644f4a2-5819-42a1-bd22-a240f3441b37/factors_affecting_motivation_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/77610744759.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/suziwob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/184f8f2f-f91c-4d21-aa52-137586456eb4/does_alkaline_water_help_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/guided_busway_route_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816e8483-0eb3-4ad9-915d-de93970edbef/12027558865.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_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 5564 bytes
SHA-256: 1c0f658a38ed1216d128cc298943035ef968e17c9ddececa8c1382ef8425f43b
font_01_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 10364 bytes
SHA-256: c4e369b0e31289c52d0254e878f9c48412a334e2df0bb54ff483fa91176d2f8a

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