Malicious PDF — malware analysis report

Static analysis result for SHA-256 c000ab6f132db347…

MALICIOUS

PDF

69.5 KB Created: 2021-10-04 05:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2d8a206a57bc035abb96e1e411c4a03 SHA-1: df986eddedd2dacb4d53abbdd914d73d29bc2bac SHA-256: c000ab6f132db3477907d52bb115174959cd8a29c0ff9a0096ac89fe41612e08
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://artecgroupservices.com/imagenes/file/gaxewexem.pdf
    • http://sl-light.ru/design/img/upload/file/pajipuvonelujezetonosak.pdf
    • http://ave-france.com/pics/files/nenuwiposuzozozoxo.pdf
    • http://robbymakka.com/userfiles/file/divunel.pdf
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/5170405306.pdf
    • http://netmutum.com/userfiles/file/93899312228.pdf
    • http://hzdsbg.cn/uploadfile/1631573745.pdf
    • http://fpempresa.cen.es/userfiles/files/66347845043.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16130b4388984b---vorezegimaleviwukudotivi.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16159e51b94eec---xafozunux.pdf
    • http://f-okinawa.com/img/tmp/files/nogunesutovox.pdf
    • http://helloslow.com/data/userfiles/files/ripezefiburawiru.pdf
    • https://maximaainfoways.com/WebExams/ckfinder/userfiles/images/files/33052944591.pdf
    • http://hotelbelleepoque.bg/userfiles/file/99175590483.pdf
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/fabitadofafoxokaxir.pdf
    • http://eqsport.nl/userfiles/file/80944510454.pdf
    • http://elementsgogreen.com/userfiles/file/zomesirorejifotetofigisof.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153e4333ad88---39916486132.pdf
    • http://sportingfoundation.com/uploads/file/rivebopuxulirogoxarowe.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161500091ebb24---fonepakumupubowilubad.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/gt9n9jl32nijkp30t09j6srkp6/57775060809.pdf
    • http://caratow.nl/userfiles/file/zelinexe.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/1382530134.pdf
    • http://tw-sincere.com/upfiles/editor/files/73549583376.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=globalisation+in+india+pdf
    • 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_off0000b274.bin
a24890df1f91f27e89a0faa1e2bccfdc76f46aa9c7cdecd06788b716ed61e11f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB274 10440 bytes
font_01_sfnt_off0000c9ff.bin
5ee21b327efb914fe0d5e4382fc5d04b0b98a66634742bf5c463ab0a6b2cf607
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FF 14968 bytes
font_02_sfnt_off0000f011.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 16792 bytes