Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2ece8f5ca5c5c8…

MALICIOUS

PDF

73.8 KB Created: 2021-09-21 02:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4cd30c974538f9c5ab10a5682940014b SHA-1: 03c53884783750cc37e43d289ef4b0e6e4bca288 SHA-256: 8e2ece8f5ca5c5c8ecc87b04e20422ea6c4966030bbdec9e288433df8d88e8fb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URLs, including one with a 'hacked apk' term, strongly suggests a phishing or malware distribution attempt. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=btd5+hacked+apk PDF link annotation
    • https://inprovitchile.com/ckfinder/userfiles/files/dirotavexe.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614062a1cbbb8---89450501717.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/24042072715.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/poluxufa.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/mivefujopazowuwason.pdfIn PDF document text
    • http://egitara.com/upfiles/files/nexodumezutozawus.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/namikunilojaradidefigabot.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/zijitadixizaxel.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/jubedugofedarowobopatud.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/jeziwamamiriba.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/rolutapiludeki.pdfIn PDF document text
    • https://greenways.at/userfiles/file/zonesuda.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-7/20210907025821991296.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/doxaf.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/wibuvizezaxidaru.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/vakunisesovadubudi.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614003451c0e7---soximolipuvug.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/daded.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/92572097442.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/56215504596.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/6781441020.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/15605246419.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/vewokifumagotulasenorep.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_off0000bec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC6 10260 bytes
SHA-256: 3af4c9f16b50bd98319fddfd4d250f21e69d61f630461d053bef2fedc6b89385
font_01_sfnt_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 17308 bytes
SHA-256: 9c42957cb4a38c6f20531829f5e5c6b9ea71d186b97a347fe43fb021b984738d

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