Malicious PDF — malware analysis report

Static analysis result for SHA-256 44063ae37e669f70…

MALICIOUS

PDF

91.0 KB Created: 2021-07-03 13:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9f58826d31ecb267e187c1b839aa3250 SHA-1: 084c7ff4087ebd7454f0d5167e76830660001985 SHA-256: 44063ae37e669f70f2a723e157fac644e7eceacab101c6ea426ca32e0767b78c
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a deceptive download button lure, suggesting it's part of a phishing or malware distribution campaign. The presence of external URIs and links to compromised CMS uploads points towards an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • 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 https://infrive.ru/uplcv?utm_term=gizmo+student+exploration+rna+and+protein+synthesis+answer+key PDF link annotation
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/96f3bf10a60215db3d8049a43d82a6e0/bevudebexeze.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/jejaposutef.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/dlrddkacrbkt7a8b2bnuljrv56/fofuse.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/68b864cd554f62203f14c101766c34ee/8771745325.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75eb4cd715---20901962268.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16080d559e6204---2449815581.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/01893afbd86c31d5651b81354610b290/35130985593.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf2ca7adeb---kiruwuwojababidivogovo.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/j999g3fc41qvli92r6keab6gm1/bawekalodamil.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/qur5utuqs3g7rk33len4l2idpt/putene.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/kudujusinozuwoged.pdfIn PDF document text
    • http://temple.mo/userfiles/file/gizamazokijixupasokonukuw.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877b77caaa5---sidodipotipapuxuwi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/a7c45ce9c6f257049f85b412b1f24571/70275533895.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0ed3bcb3c06f57edfe579f0c8b2145b6/8486370506.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/rabozedalovogowog.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/bulebikeba.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/90263490636.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/sn0tlriq7ega71pk7fk7hv2pu2/fojetupuxekikezipotoju.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/vutifisejadaxarelefil.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/q9mqr37uauiss5eapeansrfbjc/bejado.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/10764050208.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/92011745470.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fdf27398e---91753452627.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_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 11252 bytes
SHA-256: 2e3605269de7beed5a47a18dfac76b308c8320ddaa9107137f10c6ff4d2594ae
font_01_sfnt_off00011aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEF 16612 bytes
SHA-256: 9d5360d84f86f40fbcaf8df131a4d2fc2eb52923518338fd93d2a5b407261384
font_02_sfnt_off000145ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.