Malicious PDF — malware analysis report

Static analysis result for SHA-256 108874cd5501f4fb…

MALICIOUS

PDF

69.4 KB Created: 2021-09-18 01:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6ea7e3815ad2995bdef72bd5ad77461 SHA-1: ae0e10bb15ecd3a004258404f7d047266c7a0492 SHA-256: 108874cd5501f4fbffbee92a8ea2ce842771a778c1348734734fc830f70c8c6d
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it's a link farm and a callback lure, suggesting a scam or phishing attempt. The embedded JavaScript likely facilitates the malicious activity, potentially by downloading a second-stage payload or redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://happycondo.leaddeehub.com/userfiles/files/87512649014.pdf In PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/11945156621.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/xoxosudanugulevofugadu.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/vepagoseguwato.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/jejuzeriro.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/salanelamagu.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/polalo.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/xarimixosefaka.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///69536348915.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/mufivarovobomu.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/valoxaxegulaw.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/nidaxixibapeku.pdfIn PDF document text
    • https://tsolisp.com/files/file/85660365700.pdfIn PDF document text
    • http://agama-rc.com/upload/files/37929845690.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/xizatenugu.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/bikisuvifexalo.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/46813930003.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d52873c3b879ac2f70f72bd44987e490/93438866453.pdfIn PDF document text
    • https://phuquiland.com/upload/files/verazawivaginabanobu.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/85407685517.pdfIn PDF document text
    • http://aa-nusd.jp/79586336778.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/9304274900.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/tosalanopoxatetasot.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/40446789324.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/80363864865.pdfIn PDF document text
    • https://aedwea.com/upload/foto/jesilisukutopizufubupor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=wwe2k17+android+downloadPDF 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_off0000b452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB452 10368 bytes
SHA-256: 97c197cdfbb45b6bb5042c83b6d91481396936a7132be8071513c03314d98e37
font_01_sfnt_off0000cbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF8 14252 bytes
SHA-256: 6cd3722d3b42e1ed18b8484c31f151ff1fbb72f17c27139f5e702bab1d87e17c
font_02_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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