Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8e5e06043f8da4…

MALICIOUS

PDF

72.6 KB Created: 2021-09-11 05:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a272163b64be585e38affe9785a12c39 SHA-1: 4d0b6ca970abed42482728486615efd819a8d18f SHA-256: cf8e5e06043f8da43df13460ea63e59c8077cb5c48e94b1a166abbf2f03391bc
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting an attempt to deliver a secondary payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates a common tactic to bypass gateway scanning by instructing the user to open a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=download+videoshow+pro+apk PDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1f50f24f6---98099158191.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/39689741579.pdfIn PDF document text
    • https://onwater.my/uploads/file/86958868657.pdfIn PDF document text
    • http://4bzsoftware.com/Images_upload/files/vuwamigapaxituj.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/wogovemususate.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/difekiruwato.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/xorifekemogu.pdfIn PDF document text
    • https://btegypt.com/file/71939545029.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/80epp05tp5i90imv13b7ojna36/lezubexunokituwil.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374bbf100de---wusularamobagewumumasabuf.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/solixipijifogapokewipudis.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/91003636801.pdfIn PDF document text
    • http://prosquash.by/data/27268562485.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/welokidujesuroraguvonew.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/nivaxidigesuwenarodufobi.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/74670987933.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/11558032550.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d0d39341c7a4cdca76e077b64149bdff/wevejiwifufefowagoliv.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/99125598967.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/1b5e95fc08fdf0dd229e218886761c96/24295966723.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/42198216522.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/xuwunuzixikiwu.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/xinojezakobosuv.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/91106327953.pdfIn PDF document text
    • http://vlajamo.cz/images/file/xidabizavizo.pdfIn PDF document text
    • http://rapet.hu/files/fagerepenof.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_off0000ba82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA82 16108 bytes
SHA-256: 74d31c46a9a2751aef210b979fb1770a5b610fd059716ecdb745d27822aa8eef
font_01_sfnt_off0000e415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 10636 bytes
SHA-256: 6375fc7f4fd98af01d134aa4eb9942a5cc260fe382f3689b77a2d193b1cdb875

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