Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88888265b0fe090…

MALICIOUS

PDF

84.9 KB Created: 2021-09-09 05:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 75b5a2e2aa046d3fb819e1aafa094d94 SHA-1: 839983cdaecc81e6f4db88a39ac8b8566954017f SHA-256: e88888265b0fe090f66bda0fb922fa3295ca0a5807b6496a658b4708a4753ee6
172 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript, suggesting it may attempt to execute code or redirect the user to malicious sites. The presence of numerous external links, some pointing to compromised WordPress uploads and disposable domains, further supports a phishing or malware distribution scheme. The visual download button heuristic reinforces the lure aspect of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bio-obst-und-gemuese.de/userfiles/file/xupigetobiwadewer.pdf In PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132cfd26fed1---davuvijufigusoxowego.pdfIn PDF document text
    • https://fishboat.hr/files/jowubolewomekodugiripipi.pdfIn PDF document text
    • https://conrays.ru/f/data/49694956624.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/16716957820.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/49870578480.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/galijudajofalufor.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/64372415193.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/pebamakofusabez.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/jirilexupak.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/35576614865.pdfIn PDF document text
    • http://standdominica.org/files/files/16857354117.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/gekij.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tosamizofu.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/136034652.pdfIn PDF document text
    • https://remini.hu/userfiles/file/59244389100.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/bajimulovepatidejutiveke.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395843f237d---77993154996.pdfIn PDF document text
    • https://best-label.com/upload/files/46921819573.pdfIn PDF document text
    • https://pcetravel.com/files/file/5734660299.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/vopexogujorom.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/70693417293.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/35362878078.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/xokugo.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/42ru11due75thledta2ok0ndr3/79800410642.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/gomesokazugobilogifi.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/92690238875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ultdata+premium+apkPDF 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_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 18348 bytes
SHA-256: e4ff38594d43d2925a3394a7acfff625af73d92f116036c21f82688b707bb9eb
font_01_sfnt_off00011684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 10360 bytes
SHA-256: fb96458a19ee850bb35862be4b36d6c6884f8f31c9f2309a4e645f7ea60abf1e
font_02_sfnt_off00012de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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