Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ddec93b9443c87…

MALICIOUS

PDF

80.6 KB Created: 2021-03-20 09:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 348180a863d734db6fa1f14489addf97 SHA-1: 6c77b7cf9ca4df0e9add9bb7b2f36a18e652dfa7 SHA-256: 28ddec93b9443c87e2b47b2638a9aa2a67e240e0dc5acdb402d69ad63aef594c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'screensaver windows 10'. The presence of multiple unknown URLs further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=after+dark+screensaver+windows+10 PDF link annotation
    • http://crispyset.online/yo_kai_watch_the_movie_full_movie_english_downloadc8kqm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387573/normal_5ff3b1d6d7755.pdfIn PDF document text
    • http://ilkertr.shop/48899172648sn4ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_60451dd05a0ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473064/normal_5fea1e6fae255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5fe6c56fcd1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_600e4093294bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fc8792f89dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459939/normal_604af4d5e9f3a.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/b357d555-321f-4203-81cd-0bce1f6e337c/87416321419.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/industrial_ergonomic_assessment_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2176bf-5917-4eb1-ba0b-667e39d5782e/26096732991.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/vandanam_film_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/cghs_card_form_edit.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/detew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb14c644-f115-44ef-9a66-47c31ce460dd/soxumegijodefudi.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/factorisation_class_8_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/wabozazu.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/fishing_cooking_leveling_guide_classic.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_off0000fd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 5380 bytes
SHA-256: b155de0fb3637c057b1f4bc9f93f6a6d79794b309df97e097efcbb2515fe985b
font_01_sfnt_off00010fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 10544 bytes
SHA-256: c5f8b2f63865f51b102642c71e64fd228bfcc7ddadc3740f56e80dbba4700f2a

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