Malicious PDF — malware analysis report

Static analysis result for SHA-256 0704d862302745ee…

MALICIOUS

PDF

81.0 KB Created: 2021-09-09 20:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4d4afddad514d87cd035c2d6c434d90b SHA-1: 224f3116161c7f43f718ba3500f1e1931905b556 SHA-256: 0704d862302745ee6efbeb8e8ba70aa845e490bb9a2d3194358947798709f6f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the PDF structure itself is leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/8795760492.pdf In PDF document text
    • https://marblobaths.ph/app/webroot/img/files/risokobozeduvokol.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/rawosi.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/81605433498.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/damejawewejaduxabikatite.pdfIn PDF document text
    • https://blv.by/upload/editor/files/guriveverunir.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/mumilafegojugizakif.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/kisilojinetus.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/2864539082.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/68954930623.pdfIn PDF document text
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/xawanitup.pdfIn PDF document text
    • https://estoniapools.com/contents/files/bakusosowomivefasuvedamiv.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/21023775753.pdfIn PDF document text
    • https://aildf.in/userfiles/file/64222407323.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/zonewudufinaxeromuweleva.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f38d0b438c---losolipaturejozusufatako.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/36541754519.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/lapasupe.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613444a49b478---sajavurogepatatiki.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/81827663121.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/giiq6qa7aq3b3qi6ssmc2kamho/94526263252.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/14071683241.pdfIn PDF document text
    • http://cocoabuterol.com/upload/files/51936860674.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dtqh7d17svdea2ei95hk0sc5j4/bakowakise.pdfIn PDF document text
    • http://hepiran.com/cache/fck_files/file/93318433101.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/nuwevamididebajebazupada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gta+sa+cleo+mod+apk+download+for+androidPDF 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_off0000d7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 10996 bytes
SHA-256: d14ecfa087fca4c187ab37ad7ec5c6aa91ff3e272f9bd6b55c01cd8407a5c674
font_02_sfnt_off00010954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 17252 bytes
SHA-256: 974e2c19c2f49bda1ffb68da74d07bbe52ea9f8cb216becaca80bb96073f2276

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