Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b77be3a4c26147…

MALICIOUS

PDF

96.2 KB Created: 2021-08-07 07:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6f311e9cbae0134a5c901f1b2578cc46 SHA-1: 1b88f432f8ce2ffd1489a40223681891b63bdc11 SHA-256: 47b77be3a4c26147c11fd1a68238223cdc1d830a2cd2a191c7a235a66ae84c12
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://wastran.ru/uplcv?utm_term=parchisi+star+mod+apk+2020 PDF link annotation
    • https://jerseyshorepirates.com/userfiles/files/48126404782.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd5133c0c8e---toxapilasekofovolowameb.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/pn56ld4u9rcp943it2ut3pb4i2/35736197468.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/ruminozagewomulogised.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/newizebebaxisegapijefe.pdfIn PDF document text
    • https://daismene.it/file/wimaxaruxunifopo.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/1vigh1f6k340mv45dco203ai73/90373681340.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b06d34dace8---92358165821.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/73217708462.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/612e95b3673ea3718d6a337037ecab19/woxumijovar.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/tibejojubegiwugejos.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dee690da905---33788739970.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/82683850576.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1bdd10ca25031ec43c6ed4f32a07cc9b/nuferakogosojuzoge.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f1a1688d132b3d0dab43197b8d31badd/21359176895.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc57dbde72---desukobalamiku.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5719b47793---gobajidomupapatuxomixaguz.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608991da5a4a7---66240732032.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/fawurogusegubij.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/legilagudejo.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1dc0a11f---rukip.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940ad856049---tukigexata.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/lj397shvuu6f00jna8c3fhq5tc/wabomofadelopamej.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/vuberanerarumejotawal.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/14203891417.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00013444.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13444 21260 bytes
SHA-256: f5f347e589e4a449c5abec0c737d32b6a644997ac8c8c6dbc28e843f2076f634
font_00_sfnt_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 1672 bytes
SHA-256: 3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7
font_01_sfnt_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 18980 bytes
SHA-256: da8770defba6563e016b78777fa321d756c811f1d9214dcd9b57066295b9be56
font_02_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001581f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581F 10832 bytes
SHA-256: 60c5b8c3677d17365a33b5d64613c95d32395fd276af064dc81841118de0d614

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