Malicious PDF — malware analysis report

Static analysis result for SHA-256 869ce275cc12ccf3…

MALICIOUS

PDF

78.9 KB Created: 2021-09-18 03:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2f5f8c7b1569f29b43ad7ba2a80896ab SHA-1: b6f6e946e1e113f3c59e9d2d6e4a4f83f411daa1 SHA-256: 869ce275cc12ccf3e5d82da289a13f334a1284ff788ac2cde64c5e0615932aa0
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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://wastran.ru/uplcv?utm_term=d%E1%BB%8Dn+d%E1%BA%B9p+file+r%C3%A1c+cho+android PDF link annotation
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354ab11b4b6---kaxoxonakemo.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/wisekoxebifi.pdfIn PDF document text
    • https://guruvinodji.com/Userfiles/file/xidixuroritawuwovupesiz.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/74781903719.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/bizebazifusoboloxokel.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/milefi.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/12050592253.pdfIn PDF document text
    • https://polytex.de/sites/default/files/46913841056.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142ce2834377---gerujowofapajibusi.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/lefenesezene.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/nafemejifoselexuvonopax.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/fulolagurizatos.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/52280279472.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/parujuza.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/magotibakofavokav.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cc2151ad8acd6f890f6686788693bcd4/boxub.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/92398670862.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/94649318242.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/jidonakil.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/lokorawadalimifebalezefev.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/wiwijutufofibixatas.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/37766625828.pdfIn PDF document text
    • http://imaginove.eu/data/Files/nuzuki.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/96214320619.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_off0000c7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBA 10980 bytes
SHA-256: 7c94e4f70fefb68540c5061532a9be785038aca877c381c9f473d49130f4caf2
font_02_sfnt_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 20680 bytes
SHA-256: 9d70ef1657b663d0b75abfc96842486bf7113b0c372205c33d48259ba5a896a3

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