Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd89898a98fe0e7…

MALICIOUS

PDF

78.6 KB Created: 2021-09-17 17:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c259d9324db2d177e7b4905230c6d757 SHA-1: 41a046175f9f7b70289a54b3eef0edbfeee76ddb SHA-256: 9dd89898a98fe0e78423de00f0f0e1d86accb52c2693c0969a4d71b10297bf88
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of external URIs and a compromised CMS upload link further supports its role in distributing malicious content or phishing lures.

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 http://decom.pro/admin/ckfinder/userfiles/files/bugedetifebukesenote.pdf In PDF document text
    • http://dylogistics.com/userData/board/file/malizozisilupaw.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/ramebibekugopolotiniwuloj.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/zadoredivat.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/19526499839.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/31479023528.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/vejodiwejebijuporane.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/71536398888.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/vosubajifitebu.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409d7c65225---metog.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334ee613fda---rogafalatanozababob.pdfIn PDF document text
    • http://moretonassets.net/userfiles/68282680445.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/71309717598.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/20219764770763.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/jibajupubakage.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/61904892578.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/8dqnqvlqeh42k8bqe09qkt5qbc/9695777912.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea41a5660f---64868664749.pdfIn PDF document text
    • http://rooptex.com/uploads/xajeg.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/11156616724.pdfIn PDF document text
    • http://beta-rc.com/upload/files/85824803351.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/40722178162.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/monizosuzitiwemamebavolo.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/luxobolimepufozorebujag.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb75fe6f26---dofolagum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+reboot+in+androidPDF 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_off0000ce4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 18140 bytes
SHA-256: 9f7c377f3b481a88b8c6b1a5096408c51aefccf27f32308121cdfc496ae87059
font_02_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 10432 bytes
SHA-256: 0d466343f3c6466a433271ae2f679a1468ac7eb2d5d0a790be1845359bc8ba44

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