Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e6acaf2bc68904…

MALICIOUS

PDF

281.2 KB Created: 2021-07-31 06:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1795847ad04dba2b5833141ed9c7a217 SHA-1: 88de51a7f0cabf08c5cd9e67df0393bce8cef70d SHA-256: 25e6acaf2bc68904d7f73f8a2638096bcb142ef6e0354175579db7fd7458103e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, suggesting an attempt to deliver a malicious payload. The ClamAV detection and ML classifier further support its malicious nature. The primary attack vector appears to be a phishing lure via a compromised link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8910

Heuristics 6

  • 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.
  • 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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/5f1830f45576e093d83804d5db4b544c/13839038477.pdf In PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mupurofoxolo.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099519e3494b---sotivugoxibobifilefijaki.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076403b65a01---72368970449.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607747c22553c---roporuzekanozevemikiwer.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/i0jgk6bb92psb7okepj7q5ohiv/xofilogusatab.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076387ff109c---fizabudixipes.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/73057229433.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20216241129524312.pdfIn PDF document text
    • https://susta.vn/userfiles/file/48306668584.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2fa5a3e1a---zodubitakajisefabano.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da5a2c9db4---biwujivituvogu.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086efec38822---17208214789.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/79541907820.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/xitet.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/2svfadq906e431i8das4meg6up/sibevomaliripuda.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/663baa5adce8693661f9d0f7ffdcef75/37431486200.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/orilu901qv7ngdo8mh13ds9m2s/vunenusezofimanawivip.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/dejogexuk.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb987054b7---xonezukidadubujixofo.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/52335802443.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/buwajogowexovuguxen.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/zozekijixokejivedakab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=tripac+evolution+installation+manualPDF 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_off0003f073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F073 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0004088a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4088A 10664 bytes
SHA-256: a32ed1c24095973dc4f5a16661329265bb24bd0001bd8e9f6ba55602703b8b98
font_02_sfnt_off000420f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x420F5 18808 bytes
SHA-256: 89545bbc0d3b4a5808c8b965b0d09b31e86f4795481404f971011989cce13d2a

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