Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd883b6261fbcb0…

MALICIOUS

PDF

90.0 KB Created: 2021-08-20 21:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c5bb6f3d9a29909e8cf4bb5b0f29f42f SHA-1: a1369dec6d5468c8e30717f4c89aff1d532c8b4b SHA-256: ebd883b6261fbcb03ada3a1947755122ff9b9952b3e232cb5e809358be49c9a5
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 http://angelcabrera.com/FCKfiles/file/perujefezodiwopigeganid.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/b0qramp4oa5rtfaggidlup8t9t/3002843565.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/1917709188.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/7183cc92d2b152c1a78427c7a48169b7/gaxeraxi.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-07-11-57-49-qMHmJMND.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/2672939006.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e9c9114bd---nasisumodazini.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/76176089006.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/98082334975.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/45315927635.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/cf99f5c4c1ec80314df4af5ec55bf704/somutanatugelowurebib.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/bigazelis.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/24578549330.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/64e4ff1ff2ebb797251b6ee94993ac5c/wixoxikeme.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/82902426153.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/90617119671.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1877178a472c90cfca5a04e02c7aa666/42150505652.pdfIn PDF document text
    • http://usateatop.com/_upload/files/bijilipujirivebosaxavun.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/rikebavo.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/6713554556.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/52047902671.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/14055307296.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c109dc937c---8083827265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gta+4+crack+razor1911+rarPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FD 18320 bytes
SHA-256: df04fb41073d9b3a88c3f0b304925720e624cccd0f1cc11371ed5546669e8b0e
font_02_sfnt_off00012767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12767 10168 bytes
SHA-256: 034bb10d12af9e7e98ea4e3fc4452a3202cbdf2fcdc4fd94509a2e4de9c5914c
font_03_sfnt_off00013e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E79 17912 bytes
SHA-256: f220f26a2b71466169ebffbeca3c1158e279cf605f2715084c892501b980bad4

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