Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e270ce1ca364ef0…

MALICIOUS

PDF

89.2 KB Created: 2021-06-12 03:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c54fdf518e86563a5db37d4505cde6c0 SHA-1: 59a9ec312d529010fb1c15c64f61368b065368cd SHA-256: 6e270ce1ca364ef0fa242b209369f925e1452487c411837df9aceaae92890df7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating a PDF link farm. It contains numerous external URLs, with ketchas.ru being a primary suspicious indicator. The document body is heavily obfuscated, but the presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ketchas.ru/pbw?utm_term=hypixel+all+talismans PDF link annotation
    • https://xejajunuzu.weebly.com/uploads/1/3/5/3/135306682/dujutemuvemalof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600a869406991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_6003b2b4b468d.pdfIn PDF document text
    • https://xodumusekow.weebly.com/uploads/1/3/4/7/134708755/palumegafewozapifos.pdfIn PDF document text
    • https://xupazipul.weebly.com/uploads/1/3/5/3/135325103/sawigafowa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/623c7f69-c301-467d-8943-f7b2df973d78/kavixutamawiviwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2c4510-eee3-47f6-bb68-91c8d82b6e88/54561715629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec96867-c825-478a-bbe2-c49b2e7c3be7/wukutajobudabujubux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b726b0a-b005-4c9d-86d9-c93299eb2faa/khi_ng_minh_nhy_vo_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea1896e-45b0-4eaf-89af-41e4e5341e76/17876445250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ca8bc2-ac52-4e5f-bdec-be3a8c17cb78/h4n_pro_compatible_sd_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb6f6a7-f779-46d2-8ab4-9f3157d72bff/divergent_download_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ee5ca9-6c6f-47dd-8d6e-d5313513047d/baby_girl_clothes_0-3_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91595b81-b995-48ee-9fda-fdec7288cb5b/free_online_merit_badge_classes_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69fad88-7a38-478a-b7c8-7b98c8b1a2af/72364961442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71237182-ee98-49b1-b129-985cbcbeb6e0/88515748258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b33045-002c-4ec5-8ec5-6a5700f6f7bc/49107912315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97fc492-f16d-4ef0-a9bb-72dc1f78dcc7/microsoft_office_2010_search_not_working_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65cdb90-e1b4-4b9c-8322-2a10528af752/xoduvuzuxojuje.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_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 5000 bytes
SHA-256: 97e637fcfdf9470477b72dcbad44f873f115e34cefa916f77e311ce215b16f25
font_01_sfnt_off00012f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F82 11856 bytes
SHA-256: afed6e0f37cac81d090906a37f341200c5cfdc00f39ddb3687fe06caa894f35b

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