Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecd3296fcb82e82…

MALICIOUS

PDF

84.7 KB Created: 2021-09-16 09:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68a10dda461b013c6919e8895e207cbd SHA-1: caf0eb019b8a17d878bd305d0b6c68ca2a1d0d7f SHA-256: 1ecd3296fcb82e826a329ee2a47ab11419a2cbc85f3e87d324a28918e91476ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a lure to phishing or malware distribution sites. The PDF structure and embedded URIs point towards a phishing or credential harvesting attack, potentially leveraging social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://garglob.ru/uplcv?utm_term=how+to+print+a+selected+area+in+pdf PDF link annotation
    • http://alwaysshine.com/fileimage/file/87219114648.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/15294480694.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/25436749405.pdfIn PDF document text
    • https://hosrem.org.vn/ckfinder/userfiles/files/29701826450.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/digeluzimoresekevegoratul.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/31846428472.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/jakasulavijuxunakado.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/fakibisopagofowuxujom.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/ralamulemasej.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/19664396578.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/jopenafutusafaxozuxagud.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/66964416901.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/rivurunapirexodiloro.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/68091129265.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/zakazekosa.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/86202174523.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613655136e481---femijenuvidibapipo.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/vukexipazodogaz.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/raniwepifules.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/95094838397.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210914140428.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_off0000e256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE256 19176 bytes
SHA-256: 53279ea5f09c7f8d232b33436c51ae65b49eeb9ce84d8375055440ee4bfe797e
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C60 10688 bytes
SHA-256: 9dfa361dcabd47d86d5102baaa57ff29ee29d720a5fe8f6fee26c0c3ad1a1a4f

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