Malicious PDF — malware analysis report

Static analysis result for SHA-256 e740fe75d8f6661c…

MALICIOUS

PDF

82.4 KB Created: 2021-09-21 05:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1363e3ee18395db8473c3794dc92ccba SHA-1: c280a3946a7caa013f625d2de1d80792e2a624c1 SHA-256: e740fe75d8f6661c54e56790bc48e2319722de8a81e6a64eceabff1100f53bde
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the overall structure suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://laborke.ru/uplcv?utm_term=btd+battles+unblocked+hacked PDF link annotation
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/68821847028.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/11586882798.pdfIn PDF document text
    • http://halaljones.com/uploads/files/wixifav.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/371844628.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/0d80c870b95b1df4886d03fc7ef7842c/faropaw.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/62119598385.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/romozijajul.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/51004382091.pdfIn PDF document text
    • https://www.whoamiandwhyamihere.com/ckfinder/userfiles/files/40877468931.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/zixanorevuwovurezakixu.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/54692967125.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/37142304458.pdfIn PDF document text
    • https://akvaguru.hu/user/file/36060990368.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/36750672822.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/nunufufenas.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138606b7cf8e---tobike.pdfIn PDF document text
    • https://iwistw.com/upload/files/15496242388.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/wabosipaxagiloderoboje.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/61380aed53431.pdfIn PDF document text
    • https://matratva.in/userfiles/file/31666156754.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_off0000dd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD46 10660 bytes
SHA-256: 1ccdab39b0f984623a403a97dbca699f8b47ccf7cdbee296bf9a559a755009f2
font_01_sfnt_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 17752 bytes
SHA-256: 0297f3e400fa09d17919fa5dc024a8f10580f604e86be086a4765c6f20b72436
font_02_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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