Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b1621fc6af0e2a…

MALICIOUS

PDF

83.1 KB Created: 2021-09-01 03:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f82d03b5a80f42ab8e7111381078de4 SHA-1: 0ce425562a235f370ca542f8ffd563cb136637aa SHA-256: 01b1621fc6af0e2ae88ca5b5392a3885df489deb03388aa20851a0f4ee4f30a5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://vagtteam.dk/userfiles/Files/58975196710.pdf
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/43173922432.pdf
    • https://uat-tunisia.com/userfiles/file/nanelu.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076e19d1cd4a---79922488665.pdf
    • https://condominiobrisasdelnorte.com/userfiles/file/97116445985.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cc3cc6c0a---feranugepo.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6d4a1d5d3623501ec1e793b4054bcc0f/29314533879.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607eddcda9191---39977473649.pdf
    • http://loadcell.vn/Images_upload/files/21031045851.pdf
    • http://twfbs.com/ckfinder/userfiles/files/butujunusipebif.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/304ad535351c249d353bfaa17c064780/23993458245.pdf
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/faxubokunepiruvu.pdf
    • http://briarcliff70.com/clients/874901/File/49052912851.pdf
    • https://grancom.by/upload/docs/revujunimerenazizasuk.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a3b04a0fe757bbc32eb56887e963cfc5/62219837801.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/89adrrnr8ktniaksdvnmut2kbp/supokexujaranapagemigi.pdf
    • http://ecilingirler.com/resimler/files/23082585259.pdf
    • https://bulgariapools.com/contents//files/91424834916.pdf
    • http://jeyadhurgatemple.com/userfiles/file/23460104838.pdf
    • https://ecohort.biz/userfiles/files/41737997619.pdf
    • https://suma.ca/upload/editor/file/jamenore.pdf
    • http://lucann.com/Upload/file/49209789410.pdf
    • https://alkathirilaw.com/userfiles/files/24073034501.pdf
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/62652376962.pdf
    • http://classicalgardenornaments.com/uplds/file/fisame.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ryobi+one+trimmer+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a1.bin
2628006776b6b1d625437b8ddc3962e677122514b559f9052c227d82636523ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A1 20312 bytes
font_01_sfnt_off00010ea3.bin
e93d09922340aca1b1f7e7303f53aa418536c52e0eecfd8910038636bd50896c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 10500 bytes
font_02_sfnt_off00012685.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 16792 bytes