Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d2e564e19ab4fe…

MALICIOUS

PDF

71.7 KB Created: 2021-09-06 12:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6d9178af94bbc3545c8c9f7cf6beba98 SHA-1: 0c005c4557a2211dc1da19e1ba935c5d555ab1c6 SHA-256: 45d2e564e19ab4fe7802c089ffac81e69e3b8bf3ae0f9d050ee0ec3d8431e6d3
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to download further malware or engage in phishing. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609abf0d8311c---93949828010.pdf In PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0dfea1f37---gomenufotagawu.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/masanilezowojarariva.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/sabejari.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07cef5a865---58193778939.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff53643638f---8396667360.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/dogudanagapu.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/relosexilegubavamapal.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160941b14019ba---xodisobefuj.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/15923618751.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/bulapuxejomekepapobexelej.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/93157139467.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a907f6d7f27---89521572526.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/lenoletagapiletofu.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090da7461daf---8395091484.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106012155.pdfIn PDF document text
    • https://laser123.com/geektic/files/20676839941.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/17649545129.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/07fa309500ebee0e61356e1fece596bd/24761955380.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/87974328680.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/rojefamosurexamupina.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8a88230b---vanukatutarapisomalu.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/20213331381.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fc8a4132582---32504214980.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/6243336471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=2008+pontiac+grand+prix+repair+manual+pdfPDF 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_off0000b73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73E 15372 bytes
SHA-256: 46199aff5dbd2e65aacdcfff8f5a88a8032027112adf92462c0660fbf7c36e7a
font_01_sfnt_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 11348 bytes
SHA-256: a0ea661174493137d8b82df88816aeec5214b19642f11db419527ec474467800