Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0053af0bbb29e8…

MALICIOUS

PDF

68.9 KB Created: 2021-09-18 02:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0c58205bdf7258e7dce48a5e87760f4b SHA-1: a7e41e539e19cd3ae7de6ca4339b2ce5399eb2ad SHA-256: 3f0053af0bbb29e803c29279347ba06c87059cc4dcb7a4b40e820afca17e990f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous embedded URLs, many pointing to link farms and disposable hosting, suggests a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pistant.ru/uplcv?utm_term=download+car+eats+car+2+mod+apk PDF link annotation
    • https://glaze-metalart.com/upload/files/60089564664.pdfIn PDF document text
    • http://cortabellanews.com/userimages/guxelowabawitezoba.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/jiwoguxirosadi.pdfIn PDF document text
    • https://razredna-nastava.net/files/21205755375.pdfIn PDF document text
    • https://digireg.com/upload/88609738708.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/sanok.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/50097815498.pdfIn PDF document text
    • https://mobisteelegypt.net/userfiles/file/vupozedezerisugizojedupu.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210901161104.pdfIn PDF document text
    • http://beiks.info/public/file/58093229235.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210904195214.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/61419db21ef24.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/sixiwubani.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/10224389436.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109111008415296.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9b80c14286492cf48401e516d2abbc54/dixoxewu.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/fanawusebilezipawis.pdfIn PDF document text
    • http://njxinbell.com/upload/files/68630288278.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/77449988114.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/lewalarusowawufalubuwaf.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/vopinalawubenugolelonune.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/masotura.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/pufalemibonajufumo.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/60810010038.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DB 10884 bytes
SHA-256: 7a84ce62a9347251ddf1029217055f44da69517726cbbb874e02dd47f89f19c7
font_02_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 15080 bytes
SHA-256: 546e853d275082b6523617abdeab863dc07bcf4c3b12b5bc077db8221fb2f010

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