Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd40a72b77e03c8…

MALICIOUS

PDF

80.1 KB Created: 2021-09-08 00:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f93b81a1663a0db2f272fb01236e896e SHA-1: 9611f97cfff9faf13327772d846f367cf70815c4 SHA-256: 0fd40a72b77e03c8e807f83692ea8542c1b1128fb9f25e035bd3167433a6f4f8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. No scripts were extracted, but the presence of external URI links and the overall structure indicate a likely attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=lspdfr+mods+ps3 PDF link annotation
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607115f3c5875---dazifodupigagimiw.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/82de8dce9f49f4c2e3e61d6bac7915a5/kotamagokifiwiserir.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/52181121843.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/40276487032.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609091ba4822b---32706065109.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/vosaxisurezanibifeke.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c42553303---52379116272.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/fopire.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/jobowokorejukenubebubopi.pdfIn PDF document text
    • https://hse.tw/upload/file/13164478336.pdfIn PDF document text
    • http://szybkieprawko.pl/szybkieprawko.pl/user/admin/fck//file/rumavu.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/25242284453.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/25434125641.pdfIn PDF document text
    • https://clinic4lab.com/upload/ckfinder_temp/files/20210624141931.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/5a8a15eb69ae98cf8ee5f78d656d6b8a/43904988537.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/9002361976.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959daed49a9---67733988231.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/35949940351.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/tibipimozapalim.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/soxunivamuxavilisajotip.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/jifabobik.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/92462523409.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/91034454297.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16133037ce42b0---luxonebolumun.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/legapeguzokufar.pdfIn PDF document text
    • 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_off0000d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 17084 bytes
SHA-256: 496861fc79f20a132db3e27cd14c610ce7dc2370b13a68b8ef47241c5739cd3a
font_01_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF8 10152 bytes
SHA-256: f1e3cc19eb9de5779048404f1bd0c053c5cd8cb8f55d9fd309e64db322fdc18d

Open this report in the interactive analyzer, or submit your own file for analysis.