Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec206ace14dff344…

MALICIOUS

PDF

124.3 KB Created: 2021-07-16 13:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 72e5fb8e3e22db2c11fa95738e4731fb SHA-1: 3eb6420af67fe6b9e764963c533d3588f7347618 SHA-256: ec206ace14dff3440d7e320707157e273e3ee8494977ab948d0a86e2819d6e50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to various compromised websites and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9857

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 https://cructi.ru/uplcv?utm_term=as+your+earliest+convenience PDF link annotation
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/aucp8122vptkmok9b7laj58cip/zofeparagasonuxatikoka.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/62176726665.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/bad3060dd6bde58eae8cfe65044a5d3a/52587475621.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5bba8434ceae5dbfc2375bedd6b0860/60631188373.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/717822277d6837f43a78333dbba8a3c6.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa478d6e8d---79243688580.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/20500617483.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ccaf8012d---94494531042.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2sum45s4dd2qlvqild20hvk2ed/xivufakasad.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/vjo6520ru6kjrgjsfk1bf3pmgc/xuzite.pdfIn PDF document text
    • http://teplospectr.ru/images/files/27731919150.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/kegizamovonetapav.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/serosexetuwisi.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809d0cc2604---pawumuzipapakafa.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/choh0gg3dkk9m2fcn8r4b3logq/93698530086.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce8cf9ce1e---29695186422.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/84667006839.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/mikaru.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/bufinivimovegimojageni.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/84670069857.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/54625268408.pdfIn PDF document text
    • http://imaginove.eu/data/Files/99872534557.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/turexapolufelefutiluma.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/muzamimiranoduzagotapo.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/90953881639.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 10484 bytes
SHA-256: e0b6f800765f070a0a1b559aa5cb3cdf762d4f8869f4f56377c84cae7593f454
font_02_sfnt_off0001031b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031B 71164 bytes
SHA-256: 5ec73e423e10fd89cc71f40023c1e1211980a7e38c9ae28cfa98c54835ab90c7
font_03_sfnt_off0001b662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B662 16804 bytes
SHA-256: 269424bfda46b269dc9814c5cc0dec03f0f033c08aa50f44ffd00a26bf7260a8