Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1f44e8704d3981…

MALICIOUS

PDF

83.2 KB Created: 2021-09-23 00:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5936b1ef2c26d4923f57a55301a4dde8 SHA-1: 8d5c0f56e8e0879dc38508b1e4720d79f2bce37e SHA-256: 2f1f44e8704d3981aeddfd3828eb8a92568dc6a78a6c46fd3c67b0b9d5b83b1e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The presence of numerous external URIs and a link farm structure suggests an attempt to redirect users to compromised or malicious websites. No scripts were extracted, and the document body was unreadable, but the overall structure and URL findings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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://sumisaedu.com/FileData/ckfinder/files/20210909_BFC97581440707F8.pdf In PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/6732512706.pdfIn PDF document text
    • https://penzion-palice.cz/content/59021299404.pdfIn PDF document text
    • http://weingut-suppan.at/files/37861137122.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/39708105639.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/sapovokefuwakigazezowa.pdfIn PDF document text
    • http://dkind.net/userData/board/file/56019957021.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/11360773886.pdfIn PDF document text
    • https://campermagazine.tv/public/file/zirazu.pdfIn PDF document text
    • https://xn--90aweabvm.xn--p1ai/ckfinder/userfiles/files/13479112017.pdfIn PDF document text
    • http://sns.hu/_user/file/57978420512.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/wojonesezopoj.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/17380371150.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/44544889315.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161356cdbc700d---jelefanala.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15265261552.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e4b64a01f---govogili.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/14048996475.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/nikagebesoxu.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/65567931323.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/72224697752.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/63733691840.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/nemejuribezatajumub.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/bgm4o61oj2qrqqljvbija94uq2/43677188067.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/wiwipuwurobagotirokejegot.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1299652d0---miwejub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=enders+game+book+pdfPDF 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_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 18948 bytes
SHA-256: 0eccb445e9c2f9dda11a544bc5abdf214b746880d4179f7493f31f2dd0a84c74
font_01_sfnt_off00010f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 10820 bytes
SHA-256: f20954606d717960f7060bfce4c457649d128c385ce85b3f08621c5753edf780
font_02_sfnt_off00012798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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