Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9cb9f39b6f0a79…

MALICIOUS

PDF

82.4 KB Created: 2021-08-01 21:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 201124fdcf34ec5607cbd4fc5cc3f199 SHA-1: 4012e0ed33057a4683b3b842b03276c58447e8ac SHA-256: ee9cb9f39b6f0a794d3b096d13bd6037fdd544e5ca6a816017efd217284b6db7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and URL findings strongly suggest a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://prawobrzeze.info/userfiles/file/24627195288.pdf In PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d3c79628a---39851001076.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/1763993933.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6f35ee0f---razobazowejirexapu.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb71de5dbc---jigimusot.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/53340104452.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/momasobuzox.pdfIn PDF document text
    • http://cloverdiamond.com/file/koderifawufof.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/sukikovemoruvijolejig.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/zezufovofosi.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/petijatigo.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a99b27040a8---sedizipadogemage.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/78164374251.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/bepudotikulele.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0cfe31fca---57505806517.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/154368a9f187aa88d79d81962da1f7c6/6878131971.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6qno79bbbbf2klu8sllihf47rt/kutomuwalabufu.pdfIn PDF document text
    • http://web68s.com/upload/files/88636010715.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/43557177553.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac2460f04b---30561467054.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ao17es2f61p9tmalicbbjo3b03/64636628027.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16104a87aeb9e9---xesogozik.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/4513709514.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/99585039303.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/kofovobovijeluneviwojaka.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/tedunapofalomajutipudo.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/49922407617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ben+10+omniverse+2+android+game+downloadPDF 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_off0000c6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 16736 bytes
SHA-256: 7886ed8f0681368d9d945bab173ba170efb1fe0a71aa9ec9198643b75b650a95
font_02_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 10992 bytes
SHA-256: 9008b3abf28cb9b539b6efcb0360e8f1d59aadc3a96d9e0b1bf6a165320e76fa
font_03_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d