Malicious PDF — malware analysis report

Static analysis result for SHA-256 e175b730cc88e049…

MALICIOUS

PDF

86.0 KB Created: 2021-07-15 15:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 345e0a24b115fc127996dfd4b825f269 SHA-1: 458a8451d1e5478dbb965b343f1f3d38c902c501 SHA-256: e175b730cc88e0494b3ae420f2bd1c579147ab42b9689ea5d1bf759170902263
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://designbeginnings.com/upload/file/vizejegifevokipe.pdf In PDF document text
    • http://ttmplus.com/userfiles/files/18211346541.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8126c059b7---leduf.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73e218462---76484368720.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/zomimikikapavup.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2ba20e7b1---xeruraradesuxomabenevumi.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/32776941297.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608019920b3ff---luwadazirafinoxilezirowew.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/006f2a05fab98d16be10284c4fe4fca4/defifavobenove.pdfIn PDF document text
    • http://ggled-smot.com/ckupload/files/vabogepofolebe.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/11836547004.pdfIn PDF document text
    • http://fitviewer.biz/files/file/59389948734.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/85066357190.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d79a578e46---vodopedinigofes.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0a717867---tadikuta.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/36919998162.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c10f38d3---fexuxosatujitel.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/vawiw.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/102f42088d66a7cc5e92bcec3f46dbd9/muwaregidi.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/5835898633.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/1ev0d1t2a3ihdd22on7agl96jf/20293495989.pdfIn PDF document text
    • https://iword.de/userfiles/file/88666270860.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/30320709997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=solved+numerical+problems+in+financial+management+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/1ef693d5757318a98c5749a07d3a1455/98266333069.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 17908 bytes
SHA-256: 3d21d56b9d261698b500bc928a7c571dee87d71b61af2b9a5b22ed8ae9565298
font_01_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC1 11344 bytes
SHA-256: e5e81fc57e63b0080457e7b80e9c1d51edc7d665a8de73c562d679aab3485c0b