Malicious PDF — malware analysis report

Static analysis result for SHA-256 a396e3721a2ea106…

MALICIOUS

PDF

75.9 KB Created: 2021-09-17 16:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7e3af19cb08756910d403c83aa470723 SHA-1: bb69be88730861077d619aea03d8c2e9a49eec35 SHA-256: a396e3721a2ea1060c8a30f52aaf6515ff1da58c55067b94fb67465ef780f711
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it's likely a phishing or trojan delivery mechanism. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=modals+exercises+for+class+8+pdf PDF link annotation
    • http://heldermusic.nl/ckfinder/userfiles/files/15488718573.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/67237831358.pdfIn PDF document text
    • https://datawire.gr/files/files/zaxibuju.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/55909580785.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/44115507062.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368700414b1---wezavudasa.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/11638475791.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/527349610.pdfIn PDF document text
    • http://webs123.com/userfiles/file/zefilumubelexeverozu.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/79884933665.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161413851e496b---22774463054.pdfIn PDF document text
    • http://elitvorota.ru/f/file/zuduxoreku.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/83242321210.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/9330896091.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/18221793035.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340071c54bc---fapodevabujebu.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/xugarikenivo.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/83571008771.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/sunefez.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/lajerinifunukaniw.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/vuzozerorogogorepaja.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/1006619266.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/supefizedobo.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/60615068321.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/24307808409.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/12090037072.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_off0000c3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 17500 bytes
SHA-256: dc6aaf0cd2f2ac535cf18ba9958f11cbd24b787933cf89b1ef81bc93e54f0596
font_02_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 10716 bytes
SHA-256: a3d0f34537a06d19da10d572f7d761a9ae9a9663261111efc20fee4ca3e70188

Open this report in the interactive analyzer, or submit your own file for analysis.