Malicious PDF — malware analysis report

Static analysis result for SHA-256 29229feeb1673b69…

MALICIOUS

PDF

86.8 KB Created: 2021-09-21 02:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a627bcc5ecb56aed0f0f3e1b9da0d9c6 SHA-1: 9bae305a7f1f0a7b963021283ba48a9c4107216b SHA-256: 29229feeb1673b69a71d72fad52405ac05b60d23b7bcefec87142a34451d6e6d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of multiple external URIs and compromised CMS upload links suggests an attempt to leverage these resources for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=how+to+unlock+a+forgotten+phone+pattern PDF link annotation
    • http://sakesushilakehavasu.com/uploads/files/49992894897.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/dazunowofuruwit.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/pugasup.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/77234120254.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/34gv1ba7bp32jhcl6opt0asks9/89077800753.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/noriwuvipovidax.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/bafimekibodigisamok.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210910202257.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/sofitir.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/jevikakarabagefipezusas.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/015e7ee54958cf092b0f78165127d072/rojol.pdfIn PDF document text
    • http://hadt.vn/upload/files/romipojitulawibutilosodu.pdfIn PDF document text
    • http://mq-water.net/upload/tixozeku.pdfIn PDF document text
    • http://neteyes.eu/editor_up/wevavepigexigekizogup.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/boxiw.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/61649090921.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/55137628987.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/nirugonop.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dce9a8064b---25592055822.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/fukezomo.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/28847073188.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/31953228954.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/keguvefaxiti.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/71044106790.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 17088 bytes
SHA-256: 572945ebacf89c633831809f8485c74563d5afce2c83a766764cb37569fede43
font_02_sfnt_off0001347c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347C 10768 bytes
SHA-256: 10b8e473920695879d93f43e16acdea6c8264d73d97d7693f3b6f133bc75a33a

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