Malicious PDF — malware analysis report

Static analysis result for SHA-256 114630410c861d8a…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 09:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4b9b1cfbe9034eb0aa2952a17df016b SHA-1: ea531c027c1de6a93402014684040ffc2bfbfcdc SHA-256: 114630410c861d8ade34878261998b20480499ff2e5dc967df92259217e53c90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ressourcengarten.de/azubi/userfiles/files/binareri.pdf
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56281895172.pdf
    • http://m-s-g.ru/userfiles/files/womusuzosaxevomuxuvuj.pdf
    • https://pezenasenchantee.fr/userfiles/file/segidofo.pdf
    • https://xyoaa.org/sites/default/files/files/35303144270.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161329e124eaf0---41743772156.pdf
    • http://archinfo.ru/uploads/file/41710316339.pdf
    • https://www.bosingels.nl/ckfinder/userfiles/files/25978452690.pdf
    • http://snuhonors.com/userfiles/file/jefutute.pdf
    • http://rlmlaw.com/images/edit_images/file/88877524570.pdf
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/rilimovodaxobeduvamanax.pdf
    • http://skupka23.ru/upload/m/xodake.pdf
    • http://torgoborud.org/images/file/73935445805.pdf
    • http://www.sictombbi.fr/ckfinder/userfiles/files/53467513517.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5ba4e5d1f---rijonu.pdf
    • http://ajisushionline.com/uploads/files/nabojojofama.pdf
    • http://jindi2010.com/uploadfile/files/zofuxidapepudafijixen.pdf
    • http://bestbelly.org/content/files/files/lariwof.pdf
    • http://melodylavernebettencourt.com/media/file/nujopaluzeritemajivip.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3eee662f7427cb05d40c946807732ab6/vamuvisizinetozob.pdf
    • http://ingpiazza.eu/userfiles/files/66936262516.pdf
    • http://www.como-grup.ro/fisiere/file/12289008061.pdf
    • https://pierreseche.fr/userfiles/file/50686052131.pdf
    • https://bimore.vn/webroot/img/files/dagabijut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+sign+apk+with+apktool
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b122.bin
842518bdb78dca80526a44a8b92dbf48b1cb64cf87aa03c85a01cc2d7de6f378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB122 15496 bytes
font_01_sfnt_off0000d8db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DB 16792 bytes
font_02_sfnt_off0000f0f2.bin
9defe16bc76fd50c07773a5faf4c2c26693c1adc6788facebebee5e35acea1b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 10468 bytes