Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14599eb305e08ad…

MALICIOUS

PDF

85.7 KB Created: 2021-09-03 09:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a36713046cb84219290037f3e4bd7b88 SHA-1: b0b6bc3ecb7f81f2301008920be7061f296e6e60 SHA-256: c14599eb305e08ad65c7fa31c1a6398c081abcccb1f54b4a7cc6590c17e0494c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other potentially untrusted hosts. While no scripts were extracted, the structure and URL patterns suggest it's designed to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/16095813b182b8---30695651744.pdf In PDF document text
    • https://calienglish.com/ckfinder/images_store/files/pipegupifikoni.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/saxozabikagamewu.pdfIn PDF document text
    • http://armanetti.com/images/pivotonej.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160950044e5ce8---vifibisaxupokon.pdfIn PDF document text
    • https://bloomeng.com/uploads/joroxet.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa7028cee8---12827055346.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/nutusomiga.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/85915598049.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/17b89a803427636198b9eddbb97a019b/41909178323.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/sorefebesazokila.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/41a3c4496e1b16b0750ec5dcf4fd50fb/64137246793.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f762cbfffa8dea7f8773ee2b40737743/mafewivagosegufexeg.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/be19dba6a9e4f84abc9bf746dcc70e30/69922460508.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/43b2b83feb7c4477103d0c35ff667058/watug.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/bomilufoguw.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/puxoluxasupetixoteze.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210717_033316.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/paokl267nm3lj3sdf6mg58dmtf/25534041733.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/c8hfu9gc9vf9m1r8vtjglniov0/12451402005.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/kisusoposepu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pit+boss+pellet+smoker+owner%27s+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_off0000e661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE661 10864 bytes
SHA-256: 86981d376835adb2aad025f84ab7fa40ad650ae1980ba781c9ef4da6ae5afd0b
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 19100 bytes
SHA-256: eaa67d13bb2547330cc351857f100e063835d4cec82ed29e9e2cb3d1f8a76572
font_02_sfnt_off00013104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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