Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb800de1aa950adc…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 04:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 4bdfca705a1d65cdf63f3f99ba9b7626 SHA-1: 4914c2bd74a70758122467492993b5c4472bc262 SHA-256: eb800de1aa950adc031663e259e2b0e29ab64877b397ecb39b767cecd74aad07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hndgyl.com/v15/Upload/file/2021641249315872.pdf In PDF document text
    • http://pbhdom.eu/userfiles/file/nipudopexobapewadifa.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5fssaivj88rk6rhfe6glo9aj15/jezozogejiruluverinagafi.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/13141402779.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/jowobudapubaxokoroneb.pdfIn PDF document text
    • http://maidichike.com/upload/files/kuwijaruzi.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afa90b79d2a---85767501759.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/9691f0e690006222e41f82eacdb84e3b/61148118308.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/35f21f66606d07537ff2b92c758173f5/ditomuxuduzubojixolupagu.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/39887448979.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/8830fe760feabf43836b31d22e75ac50/pimekazixisedo.pdfIn PDF document text
    • https://securitydm.com/slicice/file/79975800047.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/07bcc9bd9c491b18c2bbb40122962c44/40512266982.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/76548077380.pdfIn PDF document text
    • http://rld-carbon.ru/file/64999678166.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/vijuzapoxizodamevajinipab.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/3r406obkejh2903bdqreohgcgk/73229381173.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/56795140835.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1ab40bcc---kitosuk.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/xujiritagalagaweba.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/13449334183.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/631744f21d9f1320810533597a52512d/19815136492.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/pofukinageduke.pdfIn PDF document text
    • http://quetthe.com/upload/files/migisomefadokurukekuvefav.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/jipuravadebubegufujuge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=converting+feet+to+inches+worksheetPDF 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_off0000dc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 17736 bytes
SHA-256: b20d6144db03551feefc8cd500357159918f3f87d4325e88e69d790e3468b1c4
font_02_sfnt_off00012219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12219 10680 bytes
SHA-256: 15367a8879f6e11c4894b0d2e027c85960b581243a30ff6df0bb5bfd3d9ea4e6

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