Malicious PDF — malware analysis report

Static analysis result for SHA-256 0275096acd58337f…

MALICIOUS

PDF

80.4 KB Created: 2021-09-04 16:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9fb8ef9c5b6e89162800e85dc6f550e2 SHA-1: 8a2ea5533b3cb9c60e6748af43f90c858b3b6f53 SHA-256: 0275096acd58337fe055df9698d4e3bb2dd015113f2e22da49d1459bc4d37492
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The document contains a link farm pointing to various URLs, some of which are hosted on compromised WordPress sites, suggesting an attempt to trick users into downloading further malicious content. No scripts were extracted, but the presence of numerous external links indicates a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://synerhu.ru/uplcv?utm_term=avital+4105l+manual PDF link annotation
    • https://aashianarealty.com/file/60805898194.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160946ebb27cb8---62734160037.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/wikuzogujenavubolipufef.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaa375e9dc---xevogaxupuworalar.pdfIn PDF document text
    • http://pasaru.com/upload/files/77138425210.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/9ltqf5c8nb457m0nmqbs5fbl62/janafigidawukeju.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/38347987447.pdfIn PDF document text
    • http://growourworld.com/clients/83159/File/gizimuvirewaledoxidutadij.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/worilatow.pdfIn PDF document text
    • http://entiambalaj.com/upload/file/nomupowuwubiz.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/45270863291.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/42632001830.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080b03e52756---rukojijasakiri.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/wijiw.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/wigunogodadogoliwu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a33cd60a71f---nadaxonilaniv.pdfIn PDF document text
    • https://ksuskalology.com/images/file/lisuginavorivikuxid.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/596624067.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/womerox.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a7fba2b94---buzikejowolisupirab.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/xugotugakosefesimibi.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_off0000d7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 17200 bytes
SHA-256: 8f57ebab8d2e3d96251dbf9045f21e9f72ebdb6eccc7c7c74434768e8aaa5e18
font_02_sfnt_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 10280 bytes
SHA-256: 5db06dcb5ff3a10a71ea70f510e556d59e6bd83268ae3e97c0ea727fc7c7f328

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