Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eeada4adadf9448…

MALICIOUS

PDF

89.8 KB Created: 2021-09-08 00:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e4cc87659c4a7ea6597527885f827912 SHA-1: 8ce037c7bfdd137671498a47ee8982d4a9450566 SHA-256: 7eeada4adadf9448c1d574b5615d7e6e6ba9ac20955892481ee21006edf98ce0
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a visual download button further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3576eeafbb002c232025c5ec638614d1/jifivufepatakonosezel.pdf In PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ffad76013---54137585327.pdfIn PDF document text
    • http://ativn.com/upload/file/22222592656.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/89982388416.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bab4db156b---65102006283.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/xunevo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c3cc24518---3362963952.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/bexetul.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/38792267683.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/jelalav.pdfIn PDF document text
    • http://prosquash.by/data/wuxujavugarinamurukivub.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/zumerekidasedetu.pdfIn PDF document text
    • http://expresskaliski.info/file/42610407181.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/xovomuribifomatigogadot.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1612706498c93c---9269640626.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160babff2e6839---10539904778.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/42272374369.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f82dd76beca58ed5884371c69bf2eb4d/liwipepamu.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/gagexed.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dff82ece83---zedanidagezazupufepijido.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5e48d45fbda40a5c86f5b2c747412fc4/64078105496.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/mareledoni.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebaac6c461---37067262922.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/doxikixopepakalumivemuxu.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/fe31282776fc9a7eab880d1d9285d1ca/luwatatibipulozaz.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c1c0f9c8308ed5c183f5bdc578e90f58/4005728193.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=cloak+pro+12+manualPDF link annotation
    • 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_off0000fcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D5 17400 bytes
SHA-256: 63d664b000b45d65806bd21ec3e3615011eecb312341a9507c2c1868bde5227e
font_02_sfnt_off0001421d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421D 10320 bytes
SHA-256: a6422ff072d13dfdf44f38a100b3a463a66ccb81e9568e51bb8adf6af6592695