Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadabd520132aeac…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 03:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 280d74beaba753db962c20cb2c7d2c10 SHA-1: ccd7b0cb5d2755938ba1de437f460e12b1b28ab8 SHA-256: dadabd520132aeacdd19353ad8ff1b63d59acf8be34c99192e903a5dbe32dad0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=watch+anime+high+quality PDF link annotation
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/41023517052.pdfIn PDF document text
    • https://ptogel1.com/contents/files/91022884999.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/gojevuzida.pdfIn PDF document text
    • http://sushibelovo.ru/files/xiwikaniropi.pdfIn PDF document text
    • https://ww170002.linebot.net/upfile/files/20210925235608.pdfIn PDF document text
    • https://tworaise.com/userfiles/file/46824025539.pdfIn PDF document text
    • https://www.edm-medical.net/ckfinder/userfiles/files/futatanomalamibewe.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/risumebafaxitibebutetufoj.pdfIn PDF document text
    • https://businesslife.com/content/files/10962895783.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/63526401409.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64805039816.pdfIn PDF document text
    • https://lemondedelaura.com/userfiles/file/80286091709.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/2010161511.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/pelajaxativosutal.pdfIn PDF document text
    • http://budropol.de/Upload/file/tibubunojo.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/74349013556.pdfIn PDF document text
    • http://splogservice.ru/content/file/17169598142.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/3432206961.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/furetezama.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210903202526.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/rememumedunupobik.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_off0000abe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABE1 10644 bytes
SHA-256: 2c8b6e5a7c4875e8cb75ab68d4ea11a1a4d41158b593e22eb9db660df7dffd4b
font_01_sfnt_off0000c3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BC 16288 bytes
SHA-256: 99a764552dd129c27cb378837c77d8e2b4b65ca1ac3bf70bbf50653a7d9a00d0
font_02_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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