Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3e6dd9c57986e5…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 06:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f0785062d22cb074fe90a2c0717849ac SHA-1: 1c004db823aff75eb3247277626ecdd29be04010 SHA-256: ea3e6dd9c57986e53abffb2415afe017318774d94ce1b8df5c8d7178dee429ad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm used to distribute payloads. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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 http://harnettcountyhba.com/userfiles/file/lasuzesefulite.pdf In PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/totesafi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/aaee9a17e46e4a3fe689765ecd967027/dafovaxe.pdfIn PDF document text
    • http://ergakiland.ru/files/files/86967494300.pdfIn PDF document text
    • http://riph.pl/userfiles/file/62217714234.pdfIn PDF document text
    • http://hkacca.com/userfiles/96537195136.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac8719866b---58036162152.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/7748591661.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/dudoneluwanunanipemilek.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/26874652116.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/jarepabaxa.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ec7109f4d47537e34dfeeb503e11e069/19611619305.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/lonujefesupasuretusu.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/21006138813.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/dalekanubojobubumomowuwut.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/ratemi.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/87336816989.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/fereleboju.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/45ge4brvg46flsl0l7pfs8gu5n/59936095476.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/mimofumewun.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/65196985321.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210903194230_5ge0ln.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/gewavagusugipudigiketera.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d5d60159f4e429ddca07856f20a55f4d/tolufalitevoboxokamipaxa.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/zoxuzufim.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/torubilowaromobogetiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=msfconsole+android+hackPDF 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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 10560 bytes
SHA-256: 5e1bfb387e85af94eb90d05bb253178f7fc1ef5d6914373b9db38e96aec2dac2
font_01_sfnt_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 18920 bytes
SHA-256: ef287d5c6aec758411b3b6418f2934efb54a5c5dc856080e73282b09faae4a46
font_02_sfnt_off000122b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1