Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0d05796e24e5f4…

MALICIOUS

PDF

69.1 KB Created: 2021-09-28 02:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6cb19d7a5d18f8cd127e27956e84afb3 SHA-1: 90fb50368660055ac974fdac79340cedd4c8dbb8 SHA-256: 8e0d05796e24e5f4603bd6e7f4c6f5a537ee4d2807f0761951c673da799d82bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to multiple disposable hosting domains, a common tactic for distributing malicious content or conducting phishing attacks. The presence of numerous unknown URLs suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6af5b33c5---71867458395.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/krq64la7t89sqk2c3a1ni6u4rf/pupuluguxarupodivuvaku.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/93426634868.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/pigofituwa.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/tolaxelet.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/36726044224.pdfIn PDF document text
    • https://dptech.vn/uploads/files/29104487812.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/nafupetabinulejobogeta.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/826b0156708e7d08a2a3adbfce4d05c5/40960574840.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/bizifevurekox.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/95604682923.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/11578040001.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/58686273899.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/14590026123.pdfIn PDF document text
    • http://dongbanja.com/userData/ebizro_board/file/kepovagogufan.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/tekowutebul.pdfIn PDF document text
    • https://lux-ride.com/home/u4-6pzgszajsb5u/www/lux-ride.com/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/8818807795.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/62961726476.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/titegobobamaxufa.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/45921484100.pdfIn PDF document text
    • http://csc010.com/userfiles/file/20210928050242_fgd900.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/29983725841.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/lexagagabenut.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/85391268595.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/34115635785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=is+51+prime+or+compositePDF 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_off0000b07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB07B 15432 bytes
SHA-256: 4ae8cba1ee1d7bb2f8db8d6652e3e82537147c258dfff7344e893b08e4beee7b
font_01_sfnt_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 10360 bytes
SHA-256: 235a540acee38dce2cfac8b98b478077f36d36a3ed791d429e59e972590a97aa