Malicious PDF — malware analysis report

Static analysis result for SHA-256 240d508b484595b6…

MALICIOUS

PDF

85.8 KB Created: 2021-09-13 09:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d5765f832103c3f2464d21c72a54454 SHA-1: c196bf99ed875c49d40f97c666e17bdefd608e0f SHA-256: 240d508b484595b6ee58c5db6814ddc3c99e51893fc5446e025346e6cd3b17d7
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by multiple engines, including ClamAV and an ML classifier. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's primary purpose is to trick users into revealing sensitive recovery secrets or private keys. The presence of numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggests a phishing or scam campaign designed to collect this information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=is+it+possible+to+get+source+code+from+apk
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/3d9e7e8dc623bbecbb8e91f0eb745486/febokexopepewosozamu.pdf
    • https://odlingfamily.com/userfiles/file/31462181566.pdf
    • http://ifap.it/images/file/relidoxuzapobatojutifo.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb7441ab36de62f4781d8c71a2b16686/woxolawabo.pdf
    • https://cian.hr/userfiles/file/gobabimalitekevolixajas.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613769a279492---25439762551.pdf
    • https://familienbilstrup.dk/userfiles/file/kexogarag.pdf
    • http://mega-treid.com/userfiles/files/jusawuketawanuxanig.pdf
    • http://fine-trading-knotwork.com/uploads/media/joles.pdf
    • http://tl-maskinfabrik.dk/userfiles/file/mawejokiwowizimulanelige.pdf
    • https://virtualpulse.eu/UserFiles/file/33388724260.pdf
    • http://yuanda-boiler.com/d/files/fobodod.pdf
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/tigubumodoti.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/rcte69kh9mlog6dj4mqd9gnvj2/viputopixogajexar.pdf
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/kewufanonevekoxebojobu.pdf
    • https://nikunjfoundation.org/ckfinder/userfiles/files/58244626287.pdf
    • http://metrocars.london/survey/userfiles/files/tuxila.pdf
    • https://keyword-lda.pt/site/upload/file/tumibirako.pdf
    • http://cdkuysuujk.handysociality.com/upload/files/51973331017.pdf
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11078634778.pdf
    • https://kaptenhoki.net/contents/files/zeguvogusanumokurupira.pdf
    • http://www.nagsa.es/ckfinder/userfiles/files/xolafafubibal.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/2b57e2a2745fbcb1227020df21be2d62/23950790688.pdf
    • https://ochronaskory.pl/pliki_user/File/7093283972.pdf
    • http://ourpreferred.com/userfiles/files/73347912034.pdf
    • http://www.predia.cz/userfiles/file/21570713327.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e992.bin
1f9c753f023bf75fa969a551946d77d6596f011d8b2722ac331aec8c3fff0ea5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 17524 bytes
font_01_sfnt_off00011770.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 16792 bytes
font_02_sfnt_off00012f87.bin
ed2df19401de4e178774c47735d1d16ed306816eae62ac5e4d025fb9a5f53245
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F87 11144 bytes