Malicious PDF — malware analysis report

Static analysis result for SHA-256 78096cd872449bd6…

MALICIOUS

PDF

83.2 KB Created: 2021-07-23 13:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 985ae8cfa40e43034be9af41592d9cb8 SHA-1: 6628e7b25b326355c7390893cadb7d829878bdfe SHA-256: 78096cd872449bd63a20f7ae841e41a0f888706891df110c42c61252862fc27e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, suggesting a phishing or credential harvesting attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. ClamAV also detected this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/b8621668f6fbf64c43280847fe9284c3/23421997988.pdf
    • http://studiomuraca.eu/userfiles/files/mosazudimavob.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f9629a96e38---9287221542.pdf
    • https://kawanmto.net/contents//files/87925759254.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/abf1dc64cab7fe2398479f4d41b2f314/65281213675.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77140288cd---34581792803.pdf
    • http://daikinhbac.com/upload/files/wowefajimonizizixaze.pdf
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/lixizeduzupaz.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609278e327f4f---sosuzu.pdf
    • http://iamsong.vn/uploads/files/71391456428.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3u35149ksp38a3dbv7juiu74gu/71963335826.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8ffqso1uu5c8jill8md1n5g973/21581815854.pdf
    • https://veterinarycarefoundation.org/userfiles/file/91040107049.pdf
    • http://wellfoto.cz/pictures/files/naxaz.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b750f4e30fb---42705197491.pdf
    • http://amoy-art.com/Upload/file/lojofolita.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/f188e35a172ed905d05731c3a1776e83/13715234174.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/527a0ff755eb8df116388b3691960191/keretutawejokufabe.pdf
    • https://fizjolech.pl/userfiles/file/34511073491.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42e7bc53d---54100428445.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/18887954512.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/e4587fbc9bd489d489e7bc0c87edefe0/40925648694.pdf
    • https://calendarsunrooms.com/userfiles/files/wujuxiwufewetofimimamuk.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160740e7eecb0b---mabirikebebeful.pdf
    • http://ptaki.info/imgekoprojekty/files/mukaxodexojitusawub.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=join+pdf+files+uipath
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 16792 bytes
font_01_sfnt_off0000f5a5.bin
288c53a705bda9f858adbbc7d4bbf386eff7e7805e7ba4cbac1841eda1e06b54
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 10588 bytes
font_02_sfnt_off00010dc6.bin
4aeafe74d7503c332e82485fdbb6e821a5f28b1122b0fca7aaecf8c9ccf1baea
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC6 18236 bytes