Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9235757b3f1043…

MALICIOUS

PDF

82.7 KB Created: 2021-09-06 15:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cd2531fc5772cc4ecc0a5c90692b39bb SHA-1: 060eedf9059c98abbe4c72aec06fa6e95907ea46 SHA-256: ec9235757b3f1043e8accbfa8461e44c748e8c926a9cf2738a8fd3f5bdf80916
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs that point to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users into downloading further payloads or engaging in phishing activities. The presence of multiple links to potentially malicious content suggests a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://servicepapik.ro/files/popawon.pdf In PDF document text
    • http://newmob.it/userfiles/files/finezujomufafageji.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/46283903291.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0dc6a11b11---88314186877.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021052609444973499.pdfIn PDF document text
    • http://candientushinko.com/images/file/41498196161.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/94450139155.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/zixegumifenedarowew.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdcf3db4d3---74620808892.pdfPDF link annotation
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/16afabdce7e3bafe9fbfc3c23e212d9c/14003413160.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/58232204508.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/42327743607.pdfIn PDF document text
    • http://buka.ru/sadm_files/21938362396.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134da2caf188---16276835060.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/84e1db4a64fd0f74f2df813dff057b3a/34517909828.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0d4288905---fivogejexuzerutalifi.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/wagoxike.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/vn2i3b6a8edl02qghj1k6m646e/fetunalulemedoja.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8344f27e7---19513247625.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078409382afe---21500561304.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160757d0377e5d---lupasenotexed.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/2a0fb1108962e4b49afd9ce9b7f815b7/34418055238.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=surah+yasin+arabic+and+english+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_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 11108 bytes
SHA-256: 71c62c9daab91995fd4561e7ef1ccd007749c4b6f4641edbb8f7c91ccf3f7f2d
font_01_sfnt_off0000f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 19884 bytes
SHA-256: e7a227ee7d60171a018814e4928bd75c75bb90e2878149fcd97fe5a32eac75de
font_02_sfnt_off00012529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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