Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc30084194a57b6a…

MALICIOUS

PDF

92.5 KB Created: 2021-09-23 07:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a5efb820c352bebbecb5ad9b1de14b02 SHA-1: 200d2063c1d2b4bcee90ee50d284c0a3c02fb470 SHA-256: bc30084194a57b6a74d781240bad4d834f11a43b08fc47dc649db430351cd663
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into decrypting a malicious payload, likely by providing a password. Numerous external URLs are present, many pointing to disposable hosting or compromised CMS uploads, which are commonly used to host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=descargar+gratis+winrar+para+android+en+espa%C3%B1ol PDF link annotation
    • http://flex-link.cn/uploadfiles/files/40558830942.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/wetaduj.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/5720323490.pdfIn PDF document text
    • https://12tiga.com/contents/files/nadavejiso.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hagkaa91u7tnggi2oif6959nb1/fivedununifijamafugodu.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/wodoxaboxukenenekuzifu.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/8185195675.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/97004533101.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/xarexoxawixudoji.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614baef5ef2ac.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161461c3c125fa---ditej.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/33556299749.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/97244307791.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/cce54111c2271890157b85f45d02495b/zitufinojipo.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210902055835.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/69558985645.pdfIn PDF document text
    • https://derfo.info/resimler/files/82208281383.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/94448765075.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/wepezole.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/xikoxebajuzosas.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/nererenuzabimotufuniju.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_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 10984 bytes
SHA-256: c6daf1184bb269fe0462c29cee3217b88916050aa346bcdc849aec01f1d4658a
font_01_sfnt_off0001102c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 22592 bytes
SHA-256: f0eb856ef31f4600303723c7fc6ddbe95ae740a890cbb3071fc5ac9b4a6533e3
font_02_sfnt_off00014a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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