Malicious PDF — malware analysis report

Static analysis result for SHA-256 444918203300cd19…

MALICIOUS

PDF

81.5 KB Created: 2021-09-17 02:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ec8159e166a5762b2f558b0683a6f64 SHA-1: d15cd5e58ab8ca6d46d7b3456b95584c9c409713 SHA-256: 444918203300cd198f3e6c268f58fa7f3807e75008d6cd76ae506bf15ff7e222
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing malware. The presence of external URIs, including one with 'utm_term=asian+drama+apk+download', points towards a lure for potentially unwanted software or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://huntic.ru/uplcv?utm_term=asian+drama+apk+download PDF link annotation
    • http://hotelborgodeipoeti.com/userfiles/files/wodezulenutibabuwili.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613675df12732---99161802749.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/62226607293.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/27873887969.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/nelikerijovunedexav.pdfIn PDF document text
    • https://serka.com/serka/upload/files/63295464385.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/46789211106.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/79383824979.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/51404391849.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/sazajipaveniv.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/sotokuw.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/numazifotob.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/fugusofojukezarir.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/86397876984.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/gosupevax.pdfIn PDF document text
    • http://cbstav.cz/file/83272910451.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210907091659.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/vematuxet.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/larufijuwag.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/bipumegajonagog.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/dmt92c04fvnn03re7bk3fofdga/kelatimatutoguzetore.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/6949634557.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/wokabalopifumepen.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_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 18676 bytes
SHA-256: b834dc227d6ae071292f874a4dab786f4cfb051574b25ac04bb3f6caa757a00f
font_01_sfnt_off000108df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F6 10480 bytes
SHA-256: a4e790a6929873f1759573ff48d311972b9d18a850b7acad86a296395449d6a8

Open this report in the interactive analyzer, or submit your own file for analysis.