Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce10b3c5962f5afd…

MALICIOUS

PDF

71.8 KB Created: 2021-06-28 06:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6136afce0ff4060df03aafdc62c2cc6 SHA-1: f4c52ca77c0e06d63a01ff55e530d729d708c460 SHA-256: ce10b3c5962f5afdaca2f2458792fd1edc28835fec5a7c62433e68bb54ce4934
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=cool+math+games+slime+lab+2
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce70c5b017---zabagowos.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160870ca99da06---wibasewexatexeruxinulopu.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/8b8cd45fec4717229ab545d0c2069280/guzamefukanoluzabepun.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/oqse4h780acgfrkh7k0hbifb77/tenowarujutojijidanibabax.pdf
    • http://bezagsecurity.cz/userfiles/61270522905.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/2d10f0a241856e21359705ae19d7acaa/13095500348.pdf
    • https://digireg.pl/upload/vojonofozerebubusuti.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/2a90ee755ec58b93bf9b1f142b69bf93/rokikamezamuduxobufidoruv.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a61d7236---bumud.pdf
    • http://petra-dario.info/upload/datoteke/22197931266.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4a801bf0984c2e1b2292ec87bf085413/46479429951.pdf
    • http://gdaniec.com/upload/files/wegifilukajufivaxapek.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160928249272d1---42719276309.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b25600a4ec---53449494228.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3d6a05198---41721976647.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16e236f564bb3d57e4010ffb2baa19ac/vixuletodotexo.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/13690856394.pdf
    • http://auxerretv.com/content/public/file/zesutalovoj.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/c9fe605b9552a89fa365c1f9af6e01a1/68161421113.pdf
    • http://www.bluewhaleline.com/image/upload/File/bezurokojuwo.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/bd6fbc94049385867e9b1808204ba55e/84472359445.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2c5d0da45---xepunowonivotimemomiroba.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/bd3709d705653bbeb7152eba9ff1c73c/zijosoduf.pdf
    • 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_off0000bb14.bin
2fc1cd1329c806b42e8e6c7dadbc69e9a957d0710f2e62f0363197c904eaa969		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB14 15232 bytes
font_01_sfnt_off0000e1b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 16792 bytes
font_02_sfnt_off0000f9ca.bin
c127f54448485ddb0d386a41dc3f9993279fbc7f8e0ab606578d8b9c50342e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 10640 bytes

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