Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0a8e2ee2811b23…

MALICIOUS

PDF

75.3 KB Created: 2021-10-07 13:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 50571d56c2c1278c5e2f1293990c7f58 SHA-1: c238524e371603ea6cb3a71007612c6fa6de701e SHA-256: dd0a8e2ee2811b238f2653f6c9ec62aa5b76dad16bbe2a9f8aea30d7295340d9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The PDF structure and numerous links point towards a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=american+bully+for+sale+in+ontario PDF link annotation
    • http://aptekadc.pl/userfiles/userfile/tatapegatazomekik.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/17283164471.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/fugikolobi.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/30484363531.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/sujar.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/56635160467.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fk88df5htr42kr7ln0dnslu297/lovukewovuriwirataroz.pdfIn PDF document text
    • http://efeteknikyapi.com/userfiles/files/17943540096.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/71443740866.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/41482998629.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/fimorogumerizebevagexino.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/poditavuk.pdfIn PDF document text
    • http://yuha.be/_files/file/pukejuwitenirodul.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e9ee80c17e---42399391509.pdfIn PDF document text
    • http://xinnethk.com/userfiles/file/bupijakararivusafirogi.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/pinopinisonavizel.pdfIn PDF document text
    • https://nichebearing.leaddeehub.com/userfiles/files/98242091501.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/loverowadajisumo.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/9784547365.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/davaruwitozisezozobumebe.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/33649394426.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/roseroturugipeg.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/finezimevidono.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/19669100006.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/ponajufoj.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/21972162875.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_off0000c1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 17100 bytes
SHA-256: ed0c9f99d3dccd67bcc67c48f7c6b77af436606e8bbfb716258ab1460d4ee5b7
font_02_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 10832 bytes
SHA-256: 8e5a2ea03b208585b4b8c3f22b957475014d33d52c4c7f19f2dba9495bf9df19