Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea29ba33c6d977b…

MALICIOUS

PDF

83.9 KB Created: 2021-09-13 18:33:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c06fef5f1100b608906314c18ec46b83 SHA-1: 4c8ad6ef3e2623a67044a7b4de591b784db8170e SHA-256: 2ea29ba33c6d977b1458f747463d8c95c500bd2bb23dfb4e16c91912a9c81f8c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains identified as compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. The presence of link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://asiadomainstore.com/userfiles/file/rujunigeri.pdf In PDF document text
    • http://hbisan.com/userfiles/file/92271108788.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/jokiwifux.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/polupivubezazabiduzox.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/54853086644.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/poxujijuwibanapub.pdfIn PDF document text
    • https://magerp.org/upload/files/59711706209.pdfIn PDF document text
    • https://tessuno.com/upload/files/61377b81dd6c7.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/lorevijewuxex.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/81489549545.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c408206a22---3700435057.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/bazunivomarej.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f6a960016---xawoluxusenabori.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/57202145341.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/naluxevedil.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/10715445568.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/raresunekegigasikifid.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/gokipixe.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/vuwefiluvisevizixuza.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/24844579112.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/696ed97b014f926ac80886278cd19a4c/76476203699.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/30842673404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+make+a+collage+on+my+androidPDF 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_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 10828 bytes
SHA-256: 4482a3c56b6f44c76104ac855cc7de4cf99df61b814c00a6f9cdba9277e08cb4
font_01_sfnt_off0000fa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 18368 bytes
SHA-256: bb6ba32e07ba555dd6a9bf2172dae67b1ae9dc4472981489ad0cf774a2db01f9
font_02_sfnt_off00012a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1