Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef7d0b926af2a88…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 08:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 597e7a143d696214a7bfb26f0a985f99 SHA-1: 2874aa6420cbb816d580ee16efcb4eda0a6749d5 SHA-256: 9ef7d0b926af2a8829c052518941aab8ae8a3d15556fde92d2be7752ca67a2af
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including one that appears to be a download lure for a game, suggests a phishing or malware distribution campaign. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, likely aiming to trick users into clicking malicious links or engaging with fraudulent services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nomylo.ru/uplcv?utm_term=descargar+god+of+war+3+para+ppsspp+android PDF link annotation
    • http://cartonwrappingmachine.com/userfiles/file/48668575874.pdfIn PDF document text
    • http://muszempilla.com/files/file/turefozotuv.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/balus.pdfIn PDF document text
    • https://aashianarealty.com/file/76455385486.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/4274898257.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5f77d2d7c---jifepuzibufel.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161354a6be7241---varuxufezilili.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/88598152049.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/jurajedegos.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/tetirowikasos.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/miwewutobajubasa.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/rikotuxi.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/15962622536.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16308758881020626155.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/zomudibev.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/89552823187.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/jobaginuzunonowixejizimam.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/73733695541.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/44302032814.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/gosalulo.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/rivavixamudinimisawola.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/misuresi.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/44271641191.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/beromudesenurezodusademad.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_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 19308 bytes
SHA-256: ec6c49ad75c01f01a7d7cb5e0872e7a9dbd99465a1bf8682f91ecfef7282af3d
font_02_sfnt_off00012a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A71 10908 bytes
SHA-256: 378b843f7acb0dbbc3e2f3492be8847e6c58294a22ae05696d719b5b53ed7fb4