Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e27719ff994bfb…

MALICIOUS

PDF

71.6 KB Created: 2021-09-10 18:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ed6d960d5b86b41a676ba0bfdd81056a SHA-1: 04cb749406402578c954b28a1bc1aef89ea792d7 SHA-256: 30e27719ff994bfb65d7ba57f1f044eeb62be1e96eb5fbed83985c236c342634
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 or trojan. It contains numerous embedded URLs, many of which are part of link farms on disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the nature of the heuristics indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 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=iphone+official+giveaway+today PDF link annotation
    • http://tokyoto.pl/UserFiles/file/79568155845.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109042009559923.pdfIn PDF document text
    • https://morabia.fi/images/file/57662046365.pdfIn PDF document text
    • http://chamdure.com/DATA/files/38491379552.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/karipev.pdfIn PDF document text
    • https://anakmeong.com/contents/files/regagezakitudeka.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136331934002---jiwesafixazola.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/gagufakewi.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/831371007.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/nopitijofulebisekinog.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/ratakajasatufusurakedaz.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/94276952787.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/39142331474.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/jalapomezegipuz.pdfIn PDF document text
    • http://verkaufs-akademie.com/userfiles/file/rumosikufemi.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/24756506357.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/48142492054.pdfIn PDF document text
    • http://gardatrans.com/content/Files/13835387882.pdfIn PDF document text
    • http://korytnica.net/data/files/12812440819.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/zuxaxiwijuki.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ac2be075e7b36eaa2ba74798d091b580/77909970991.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/38176990263.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/naxupofatatidoxetoke.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16135ff776b9dd---jibotuxa.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/zesafejawibepun.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_off0000b770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB770 10848 bytes
SHA-256: 88225985166a6108ebbd87c201a40a206d07bd4e811dccc27c01d71aaef0d3ad
font_01_sfnt_off0000d045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 16052 bytes
SHA-256: 5b63e6e22c9607acc7c51ca260eca9bea14a1b5c49374f42d14c0cafebe8e32a
font_02_sfnt_off0000f911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF911 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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