Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3e61fe41ca4a73…

MALICIOUS

PDF

80.6 KB Created: 2021-08-04 15:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fabadc230d2e00efb3947b9e3cd1b803 SHA-1: fd073fa08dfffbb69d134704a6a612661254a3ce SHA-256: 8e3e61fe41ca4a7363f47e8308690965caa0ed70a7371d8df824dcd4cdb880ec
204 Risk Score

Malware Insights

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

The sample is a PDF document that contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates that the document attempts to trick the user into installing a browser extension or update, a typical social engineering tactic for credential theft or malware installation. The ClamAV detection and ML classifier further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a977b957524---fubukidaf.pdf In PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bf9f488e0---mozatapefekozamakubi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5ee7c0970---7489042696.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/wavoz.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/kixuzerenepoxide.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210608160538_k2k3f4.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/savebi.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/42775118895.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80609829135.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/juwuginojirowegajopaxajir.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b2318d2a02a.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/wotumazetuwumovu.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160833bc78b885---50014774281.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/82851327718.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210630_EBE4BD604C6777A5.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31944bdedd---siverupisijujuwa.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/2eef47227a9704a6e6108b901ca6a1b0/baguzokumivateguv.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f586e6af27---kunoguxugufatuzo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a962a480781---55801638640.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/89792539939.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb9d6e78c62dec217b0c216db8aced9a/ladot.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e00a6a12f94---55171978672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=4th+grade+ela+state+test+2017+answer+keyPDF link annotation
    • https://mediaget.com/userfiles/files/mobatavomenuvumedumagaxiw.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_off0000d5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CD 10932 bytes
SHA-256: c268cacb7e7151246d3c663436286dbf4bb877c2c9c7f0f7b1dd71da21058a84
font_01_sfnt_off0000ef25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 17104 bytes
SHA-256: 986c1d3d7af62aed1523ae4ab889cc1066a72de46234049eadff8884bb7f3304
font_02_sfnt_off00011bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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