Malicious PDF — malware analysis report

Static analysis result for SHA-256 1270ee7efee9befd…

MALICIOUS

PDF

94.1 KB Created: 2021-09-06 18:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: aec9855303845b137d4e1ad7cfc1dbdc SHA-1: 0fa8227c7b31230088d764b9bed89200e40adcbb SHA-256: 1270ee7efee9befd99c334b7850ca657b30058eecf01de0004057b48db01fb9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://www.cafeinca.com/img/public/contenido/file/gepikifikaralesim.pdf In PDF document text
    • http://kenshopvn.com/uploads/files/gekatekevupikesezoduxalek.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/o82riu0be87e0f6eeb1q1rthaa/39387721216.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072d0ab38fb6---48117059625.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/jobarifefotapeki.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ac9d901dfa08c72bb5171386a6a8ad3b/zepijiw.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/fawibi.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/77832148097.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa2e81dc24---gejipugagodajakigedibita.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/papelizupeza.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/41e9afe7bd8f7506fcb120869b878ff9/32418922229.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c72c2b9e9a8a87d10bd305ca54e43a65/bivapar.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/xalovuzagekixezidu.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/94778855441.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202108260447244422.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/5kh0bllnl7d9j17gajgloj1kqd/69192895543.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210606141144.pdfIn PDF document text
    • http://bwc.lt/i/dasokalakuxewi.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/zotoj.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/28237565707.pdfIn PDF document text
    • http://benrassam.com/uploads/files/mutop.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/panevenonaxusekuk.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/99324749919.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/wujodavigebo.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/5730ba65f0a4bc1d91b48eee8c1e6adb/63541123751.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0516776d09---midumagibanosebiv.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094600f569fb---pipamogopisumofigivon.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/41067630782.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=armitron+pro+sport+watch+manual+45%2F7054PDF 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_off00010813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10813 11092 bytes
SHA-256: 634cef29b2a63f2ce205a790e6a6c7e02ea976362adc6415c8f18e4632bd42f9
font_01_sfnt_off000121fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FD 18460 bytes
SHA-256: b7843c1e0c629202d3bff8868270b09168f8db128ac8f5492b4758d404740d46
font_02_sfnt_off0001520b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1