Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaedd34136368be…

MALICIOUS

PDF

101.9 KB Created: 2021-07-13 23:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69181515ac080e20bbcc55859b82fd3f SHA-1: 31b37ffe3cd491cf1e2a9f7e6d70520a6b8359c2 SHA-256: acaedd34136368be119b7437be079131fbb06ace8dc4e4007be7f82f051aa89b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as redirects to phishing pages or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/52611c38e65fb11e039609e4cdeece83/64836775687.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd44670e72---kalesujud.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607176a37f82d---luliza.pdf
    • http://allmedicus.com/userfiles/file/namamo.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e7572ce0c---bixukilebunobif.pdf
    • http://kbo.pl/ckfinder/userfiles/files/27353013818.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160db605522649---63653522807.pdf
    • http://bestbelly.org/content/files/files/4336186746.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/7d4a299fad36ab2ebef45c34e479462f/jazizewujomonetox.pdf
    • http://csc0451.com/userfiles/file/20210624063335_tc5nem.pdf
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/lolezumudixikapesoripul.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d379bfa7691bbbaa76ca4ddf0e32dd7d/18245828905.pdf
    • https://digireg.com/upload/58042592053.pdf
    • http://dzbnf.com/upload/file///12553435102.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d0fe89430c2a31188d889b7238a7415b/72409230887.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3f27bef3d---wadami.pdf
    • http://twtipa.com/upfile/files/2021/07/08/93159877198.pdf
    • http://novussiteyonetimi.com/uploads/file/xipitonuretetofulasese.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/293887b802945d97175260a9b7c0eff7/saluzolomejejiji.pdf
    • https://netwindowvn.com/uploads/userfiles/file/tafosixapadokavebob.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16074ff07950eb---famijijakeponuboteve.pdf
    • http://belgium-ex.com/images/blog//file/bajumowijidomeparagevav.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/84853a1129f96a1401cfd79605a4d77b/jilepupiserinemad.pdf
    • http://envigest.cz/upload/file/kamezala.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079039e160b3---72957030672.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d982ff3091---giraxavenix.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+wilson+administration
    • 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_off00012eb6.bin
660fe3b5075fadd96a05adc6488f51fcff00c937cef68fc2e6ba9784f84ada32
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB6 16964 bytes
font_01_sfnt_off00015a76.bin
8b1fa8a6d086b34e8bcb60ff90ce3be095e8b9fcb18bc2101b103bcea366c6f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A76 10564 bytes
font_02_sfnt_off00017268.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17268 16792 bytes