Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe328dab00435715…

MALICIOUS

PDF

83.1 KB Created: 2021-09-09 21:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 15b299582e9b27f7c0d32e898e7858b9 SHA-1: 62de3ef23b21226676d28b724e3f0c4e6cbcb530 SHA-256: fe328dab0043571521e37d340924c6688f0d8500c45c7588422433d43a4b5797
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a link farm pointing to various disposable hosting sites, likely intended to obscure the true malicious destination. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may instruct the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://teresachild.com/upload/files/73365666321.pdf In PDF document text
    • http://abwcockeysville.com/uploads/files/30023354038.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/tevefusinuzugorevavepar.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/86240955834.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/98594290310.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/2807805260.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/79982956195.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ffcfe4971c---tamidazew.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/86610859541.pdfIn PDF document text
    • http://01host.ru/userfiles/files/rakadobakidoropuwokadu.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/81700718446.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138292270f8a---28173812214.pdfIn PDF document text
    • http://www.heksan.com.pl/file/zerojifumujuzuruge.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/aiq5791pslpf1efle7oimanfh1/giresepidadoso.pdfIn PDF document text
    • http://nfc.soo.jp/file/14395522968.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/riravaradugedasivirogel.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/kakuvisuneputamagelurewej.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/zesididutiwopiwopi.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/75743072165.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/14623866478.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/89973400329.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/9965722251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pdf+creator+download+for+pcPDF link annotation
    • 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_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 17028 bytes
SHA-256: 7a479738f2fb0f2bc685cfb8ad771db680f74bc0c3310e265b318b31cb4643e7
font_01_sfnt_off00010ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12707 10440 bytes
SHA-256: 8376795d53b3338550c6a863dea6384ad168d8072bbbbcab35687789dfaa936d

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