Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8059cf5ce442da…

MALICIOUS

PDF

70.7 KB Created: 2021-09-25 02:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a7dd8a5992e33b841e33a8b298007342 SHA-1: 1e5f5f7454aee5bb51651265a702f038c16f46b9 SHA-256: ae8059cf5ce442dac9fe404e0d5a69be97a7e427b877b96e6e0935c497058ac0
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, suggests a phishing or malware distribution campaign. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically points to a link farm strategy, aiming to obscure the true destination or spread malicious links across many domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=minijoy+app+download+apk PDF link annotation
    • http://vekosgroup.ru/userfiles/file/fadilenirowub.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/nugavanu.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/gegot.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/77130341582.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/14092418598.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/gasasosexivawogudiko.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/40660141381.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/13312420434.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/94895398044.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/14355155568.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/keragajojebinatobasovu.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/gixotomabutiwugem.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614514ee53c7a---patefezawaloxepanilanu.pdfIn PDF document text
    • http://analhospital.net/file/files/10287594072.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/putenogivepamitefero.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/99463492625.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/29012455666.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ccd190039---volekizefevaditutoteneke.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/3472403635.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/77047806993.pdfIn PDF document text
    • http://elskenecologie.nl/files/xisotisowuvapogovipaw.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/95877630390.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/85722120955.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/23309298477.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_off0000b3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC07 16536 bytes
SHA-256: 456a86ddc46fb48ee4d68412255d2530d383a3e7bd93feece546db1e65f7fe85
font_02_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 10304 bytes
SHA-256: 89e00b1b28022f6ff9c1dac040e8a59446fbfdeb0234f842f6af09a835180928

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