Malicious PDF — malware analysis report

Static analysis result for SHA-256 912f1445aed890f9…

MALICIOUS

PDF

75.3 KB Created: 2021-09-12 22:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e6a6bd4c28cf511ed2f13fab6be0dc7 SHA-1: 0c69c113d0ecf8d7bf70fd3f2aad959c361ef642 SHA-256: 912f1445aed890f9470c4c58b7c00111190f357a55945f47f1079aa93c9eebe1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. The document contains a link farm with numerous disposable URLs, suggesting a phishing or malware distribution attempt. The presence of embedded URIs, specifically one containing 'download mod master for minecraft pe', indicates a lure to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://naturestuff.nl/siteimages/file/14913499469.pdf In PDF document text
    • https://carparts-fixture.com/file/file/45437403203.pdfIn PDF document text
    • http://cwesp.biz/upload/file/maxuzozavuliz.pdfIn PDF document text
    • http://e-hematologica.com/users/file/jizepepo.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/finijujujubev.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/nanazigeviju.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/228523390.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/5fe9e9b8b5338cb43331bcf4aa433a77/8285532694.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/69398192960.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/faniketakinegokib.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/zoduzitiwoxupamo.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/51711296105.pdfIn PDF document text
    • http://sokole-tps.pl/userfiles/file/pibolisazizuginivivawo.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/xonawutezikexowododizape.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca0f38365b---28877112551.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/9913142355.pdfIn PDF document text
    • http://goldia.cz/data/file/15155034889.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/lugekuburoxoleruj.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210912084945125.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/gowifamew.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/koxabiwamesidukizepeziruk.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/85007104781.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/jusejojun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+mod+master+for+minecraft+pePDF link annotation
    • 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_off0000c4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 16300 bytes
SHA-256: 7308932f8a0f3cca30250838a05766ac0cfdaafe23ff50a61172dfead3b1353a
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 10868 bytes
SHA-256: 23726b60541950cd24b468382545c9c2496276d3e277710292d1fd743bfcc5ef

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