Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e5d4cd190385bc…

MALICIOUS

PDF

87.1 KB Created: 2021-09-08 04:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: e3556afe736e7ba83604a31fcf3c0c5d SHA-1: fe446eda104af35baf83b4da9a86fb817aa031e7 SHA-256: 20e5d4cd190385bcd7dbf61ed16918b8cc37bafe92dadb55c38ad320af5d79c9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://suliaok.com/v15/Upload/file/202183819564580.pdf In PDF document text
    • https://emmaushuis.org/pages/56577313673.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/p2fotu5cuj1q4ak6tv67mhq3i7/sexogizun.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/53175321442.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/sijutoligijepozejexemova.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/89269024380.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021061117080673499.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/lidotonaravuba.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/762ebc354efa5e57a9e719aa0915b728/nexokebaw.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/afe9a5fdf93f72e2591cf08c01b48c1e/xozomuriluro.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/jitufedekubonokuserinimar.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161058e8ab3235---58603158677.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/tofakit.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/52301774652.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e62647ee0f4---22099364060.pdfIn PDF document text
    • https://langumeistras.lt/i/File/lukexebazefosemi.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/27817748846.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021060323000673499.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/83597bdac7bdd0346d61aaac898782fe/botunigobuneruz.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc8c444d08---89826659725.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/kigosidejumedetexa.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/11469860391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=synthetic+division+polynomials+worksheet+with+answersPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 18984 bytes
SHA-256: c500459d2e11e06c35ae210ec3aa124ec77589c3b7775ee82b20eadfaa3cc0ea
font_01_sfnt_off00011b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 11212 bytes
SHA-256: 40ef9266d8811fcea1c789b7d8153a6748953d54b209a372ab8b9bf838ab56fc
font_02_sfnt_off000135b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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