Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ee06eb6695a9b7…

MALICIOUS

PDF

82.8 KB Created: 2021-11-07 17:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 05742ce12a34f4eafed049d9c62ad1f2 SHA-1: 3687521b1ff063c0a56027e7740f1975aa80352a SHA-256: 48ee06eb6695a9b750d513c44685bfc7c15dca8dfde406415c50d0048eeb8c0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, hosting numerous PDFs on compromised CMS upload directories. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery, which aligns with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616ee9885918d---nebuwaromewuwesu.pdf In PDF document text
    • https://biothiennam.com/media/ftp/file/72976963939.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16172f017d5b61---61172718646.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/xuzumosusimerugim.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/82801446108.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/farijabofikotufuserabofo.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/dugufimikenas.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/69358201547.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/76599357506.pdfIn PDF document text
    • http://onelove.cz/file/pabobisarumodojotipawov.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/8fqp3qr1fdfnmqmfrcupun8bd2/diwibuvixemupumesufi.pdfIn PDF document text
    • https://media-get.com/userfiles/files/88509188730.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/xikisujegejijofesiwiz.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16169021d2be5c---xurebemo.pdfIn PDF document text
    • http://gckir.jutrosin.eu/userfiles/file/97665139467.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/dagalemonijazure.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/votuziluzulebanevuz.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16149573da8daf---84428088893.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b0e3953f7224d446bcabde88151ffcad/5615148743.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/63100210864.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/juluresidofexedi.pdfIn PDF document text
    • http://azizolace.cz/images/file/vugiwivumukurez.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/kalewomatefojojomukev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=lcm+of+rational+expressionsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 10700 bytes
SHA-256: 919e83389e68186b0ca1db1432558e0c4f76c17886c77860387ca4d85830e1ca
font_01_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off00010bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCF 18656 bytes
SHA-256: d903d6fce7d3e3bb80f9282d536e4026ea81fbc0893f4ef974b6c985c82606d0

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