Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44c4ba02962f05d…

MALICIOUS

PDF

93.3 KB Created: 2021-06-23 15:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3d3111ea2398fc5fc790e55176ff5aab SHA-1: a418a884b08afead5b966a6ed197c7baa4d7f9bf SHA-256: e44c4ba02962f05d5f6f17d33e3472cf6f1c5fb3bb4f0f35bb272a8bee4a2890
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous links on disposable hosting and compromised CMS uploads further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0g2nj9oviat4f4g1gpo55ipi85/zowezesepolida.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b1765efa9bf00abb638f9e993119d70e/28687539812.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/25347050828.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/menekipekavelifoporowu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080355025ff7---69519430335.pdfIn PDF document text
    • http://babamoleskine.com/files/file/pivudezivazuzuro.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2e224c894---6374951650.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/5de2322aa79964ca7362928eb7871ed5/povuz.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/28581389184.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/33366c41aae5c5c4f09cc23ca70a3d03/95085110070.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7810b2e71---47636572625.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ed81c21c5---suwisetatisof.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/aak4hjhs0nklp315p6rj868hbg/bovekosotojal.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/a5f7e91af0e0b2ac3231977511bd624b/burodetok.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile/%5C/2021051918505039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=rajsekhar+basu+mahabharat+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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013f80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13F80 17056 bytes
SHA-256: 58cb8d5c1dce970f36a3e630fd27b2c4ced01a5289f9de56c45368e87de86d4c
font_00_sfnt_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 5536 bytes
SHA-256: 9a093d3e0e1505b885c24fe730280f17c7686a15359ff6690798b2c8fefe828b
font_01_sfnt_off0000fa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA49 9976 bytes
SHA-256: dfcd36acc35cdd12ff83b333227e5a5705d7190f21b15979e37823d1ecba2a38
font_02_sfnt_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 11180 bytes
SHA-256: 8bdaa14dbc37de1c4b4a2b2d4cef718e8491ae793e586f6d7c6eadb43b4b6ad8
font_04_sfnt_off000157e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E2 3544 bytes
SHA-256: 5735aed98e10d2bd1ab8dd5d9af87f2903ba5f5c9d845bbe624b83513c398ce7

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