Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6614146cafe218b…

MALICIOUS

PDF

121.2 KB Created: 2021-08-16 21:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 80b948fcaebff9eaf3a236e453143eeb SHA-1: b48e7f5cbf87f936f24c3acacee7cd9e1b8b0de0 SHA-256: f6614146cafe218bf4a39302024d6d5497a36e3c92353451676f7f8ebfb82bf2
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c82a7f39a6---puzugamevenojogaxesodun.pdf In PDF document text
    • https://juvelyrikoscentras.lt/Files/file/56076804982.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/95432052627.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/54099633570.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd7d0b1b6---50693518000.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/vh58i83gtil0kri5h5lqua0l17/xizedirenele.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/xufutowedemiberidug.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160774d950845f---30755059049.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/312b14b42652d804e7b1f65f6d1d74b9/sepeninu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160928c1e42f89---bebovasefotokogevi.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hre7eqmjv1jsdhm8dgq8rd6sj2/jusexixodamumex.pdfIn PDF document text
    • http://fullx.net/files/19056808864.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861fd6939df---wupib.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/vexujurezimatugijasisele.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/78722504877.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/53671150314.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/sefijerusakibi.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/wibupizimamisaxif.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/55b84ed77767b4692eadcdac5557ff1e/30957886878.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4a894de775dff15455762f37e24aba7c/farusefiruwatiki.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/jatazuxik.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160fc7cb1b5903---rumekusuvelamijowitajob.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/gebodebugipivubutibi.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f300a4195---tomevowisiduxukoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=historia+del+dise%C3%B1o+editorial+pdfPDF 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_off000171d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171D6 19716 bytes
SHA-256: f6780fec6bd30a7970e3a324dfa3b29252fbb37db78aefc3a674e6a9a27b9b05
font_01_sfnt_off0001a3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3D7 10584 bytes
SHA-256: 75107b38c9163aa14a7595c093b34ef2edfddfdf74457f85b625e01571839702
font_02_sfnt_off0001bc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1