Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89342728fb8e727…

MALICIOUS

PDF

87.8 KB Created: 2021-07-29 21:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 75e9aa735068fd258becf13a29a4e46b SHA-1: fe4dfa2f13175ba82f24dc11465b5e77bd97f866 SHA-256: b89342728fb8e7275095dc64e43b96129279c98a53bbf0c320947bf8c31d4f56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://archism.ru/uplcv?utm_term=score+world+goals+hack+mod+apk PDF link annotation
    • https://deitratech.com/userfiles/file/34120656992.pdfIn PDF document text
    • http://henca.com/files/details/file/68975425027.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/4el2qgu48uhjnkehiq9026hda8/miketoripodeludu.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ad9f4ab7068417c39cc9f0852640f8d3/pexibaxelifu.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/98949801655.pdfIn PDF document text
    • http://kotolantopeni.cz/file/pobubexaxejepajomarifofu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/d6foh5jeg7em08rs64kgf8beqo/23738448995.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/daece489fc4704be69f75229bf376916/peziwuvofegatadurimil.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/zabojizodafaze.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/86910529847.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60bd5d50c9074.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acdfa3efe5d---nazuwokubixoxewew.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/wideravi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3dbe2daf8b---xakamabeworojulaxaw.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/30634453608.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/zusubajopetu.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/96981675963.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nisumefu.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1b498cb3c---42937199362.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/ranukemozakamojifozuvova.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/12111473078.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/ladisepugijoberewe.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/89231144859.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

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_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 10920 bytes
SHA-256: 022e28632dcadbe022c62ac2d843eb774b2d3356c2d5c9ab15dffd53e43b4982
font_01_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 19300 bytes
SHA-256: 1bc71af519f4b284806d4a2ebe76372f88fb0f2904fe680e9480f0973a0f5ce3
font_02_sfnt_off0001399f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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