Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da066e2d64d1342…

MALICIOUS

PDF

77.1 KB Created: 2021-09-17 12:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8406000a09d47cd70c744a53929c1486 SHA-1: dd1dd66928a1b3e93bd51d181bd1192266a92631 SHA-256: 7da066e2d64d1342cda2c0773c66d064ea21b2224f51d0ba80eb8e3286543fa0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://coretry.ru/uplcv?utm_term=2+player+superhero+tycoon+codes PDF link annotation
    • https://hinodanang.com/uploads/image/files/41838561953.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341aae685bb---65026327672.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210916_d5387.pdfIn PDF document text
    • http://blccy.com/userfiles/files/lidolivebomuserarijufozox.pdfIn PDF document text
    • http://vpsystem.com/files/fck/didogunerajamedod.pdfIn PDF document text
    • http://360global.ca/userfiles/file/21126687593.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/sijakisawuwuxigetowagoxol.pdfIn PDF document text
    • https://gdaniec.com/upload/files/gitewif.pdfIn PDF document text
    • http://ardeche.proximeo.com/ckfinder/userfiles/files/buzozabajatipudolovesi.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/lovepalareka.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/rularamo.pdfIn PDF document text
    • http://voijin.com/userfiles/files/xuzesubikuvow.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/46518396733.pdfIn PDF document text
    • http://pedraferro.com/files/files/20126495433.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/fejokiv.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/tabopotoz.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/84303847084.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/81855451353.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/vfuo3rv1u4ktr0go8um1093eb6/40670014254.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/37997316020.pdfIn PDF document text
    • http://195exim.com/datas/files/87479498989.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/banofemalaluwudadulekobuk.pdfIn PDF document text
    • http://alcantara.cz/data/file/29820606988.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/jumapuji.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/winejegorojadage.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/mivovujolo.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/38459431927.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_off0000c9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FF 16872 bytes
SHA-256: 1afcd6e3204305e492845ad09d0f34afdfa98fe050a855620c3e7229363da1f6
font_01_sfnt_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 10756 bytes
SHA-256: 6035cc6edcebe334cf71645a6e78c88e0059f27cc7bdfcd99a33b69a1759c499
font_02_sfnt_off00010e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1