Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe2146ce32fb5b0…

MALICIOUS

PDF

77.6 KB Created: 2021-09-20 09:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 59d9895232e0744fcbf15711d805da1a SHA-1: 0210e0238edcb27bb9df2e5902def9ddf2c4dc85 SHA-256: afe2146ce32fb5b0d15e6e6c379704b5f493160ab068f6b1047766567d1df9f1
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised CMS uploads, suggesting an attempt to deliver a secondary payload. The presence of a visual download button and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the download and execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://angem.fr/userfiles/file/tuwoxekuvuludatu.pdf In PDF document text
    • http://career-id.org/ckfinder/userfiles/files/57036405195.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/46836878587.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210915_151638.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/2365231821.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144e77d5e06f---makazokuzewetupodazugop.pdfIn PDF document text
    • http://apple888.vn/luutru/files/19393391231.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/35471176962.pdfIn PDF document text
    • https://inarsindbari.org/uploads/pafawetiwezewigikube.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/vipajosavabugodugodaj.pdfIn PDF document text
    • http://rs-entp.com/upload/file/nerixopuvikanuserobapudar.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/degibojigevatelozofapeduf.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/78290428546.pdfIn PDF document text
    • http://zae.me/datafiles/file/14872393412.pdfIn PDF document text
    • http://hyswimpool.com/userfiles/sulodok.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/fojakit.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/29563119078.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202109/file/1631596509.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/seselisowuku.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/51713621794.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/dovofukarejatozoma.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/bejozezudebiwiwuser.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161357b8803524---kobunada.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109121947533567.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/s6mnk5kcri0a4glu4tvr01p10v/lifefinonigilowefalixepo.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/tirojatege.pdfIn PDF document text
    • http://foxhill101.com/userimages/ramuxipafesemezikivisiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=easy+frp+bypass+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_off0000cd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD21 10492 bytes
SHA-256: 83d6fb982a5ceaf5920d8e01c150499f4ddbbb483dac0b3b839ecf60fe66f2d0
font_01_sfnt_off0000e4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 16864 bytes
SHA-256: cdc1431b02f5525bd92f10fa349f2787b3c3b4f58c793a9cacc0c3f08941eb5d
font_02_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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