Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee14043a181252d…

MALICIOUS

PDF

74.2 KB Created: 2021-07-16 01:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de68fa1c2f30244061248db69aa839d3 SHA-1: e775c1defd08c5287b0161643cde3b6ee2adcd6c SHA-256: aee14043a181252d6b16891141fe01a1e201515e51e748fbe821bb4aa0580b0f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which point to compromised websites or link farms, suggesting an attempt to redirect users to malicious sites. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 7

  • 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.
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=risk+and+rationality PDF link annotation
    • http://vamaconsulting.sk/userfiles/file/midujolesavuzotuvaxu.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e233206c671---82698082220.pdfIn PDF document text
    • https://ubranni.com/uploader/files/41574577491.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160756525b7e09---xiwanokezoxamusijed.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607085d59147a---kitexosuweluberu.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce4889148ac5e305d90c9a924a9cee0e/mividibopefa.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/82669227491.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/v040054g5cqunnmk75d47c3mt7/55755983920.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/wolesegaf.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ebf0ad531---62735327371.pdfIn PDF document text
    • http://martonelektro.hu/files/file/korilazinumebapifagijudar.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/jowonixifij.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e1b31332ffc05e5ccfa92c1277e779f4/81016737889.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ef2c82141---fosetutunazak.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c321244e0---65795923543.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/e63e6e8c49ed64afd101dee41a4f9c46/vukufepafaturenegiwixodu.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/malunebewavoro.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/dd0ed18cf9ae6a7ff20e17ae9eea9674/verupamogigunirebejugidu.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88892335a---7221222014.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/61038078603.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/45042472939.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5196a28e17ab76d90faa8fe97c74f3da/tegaxobasotozarer.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16234661242075.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/47524812596.pdfIn PDF document text
    • http://sdds.be/userfiles/file/moxavufamojenemew.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/59686183955.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD5 16424 bytes
SHA-256: 1df04129fade79e55c594c2239ee8a2895993e1dd3a3bc914f3072eb944c65d3
font_01_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 10360 bytes
SHA-256: 8e61fdc4b30173eaa8fc86f75c00200bcad895f6ad9c9989fe5ba77ea72795e3

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