Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ca78296ef52ae8…

MALICIOUS

PDF

104.7 KB Created: 2021-09-05 07:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ca7f6b17674ae7b463b0296416889b1f SHA-1: 6f6d7462a2c609918588500b83a2e0f586476ee0 SHA-256: 07ca78296ef52ae859ef71b363785aa8bba0828d7a7df3da91bfb03e0eac292b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of multiple PDF-specific heuristics related to URI and link farms supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://aawyx.com/sites/default/imageuser/file/fiwozunokulep.pdf In PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/a0prp81qjvrakhiekgoi3s17od/logovukajamokej.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/41168746253.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/96471547184.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/gepuduje.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0a6bbd1ec---74406645762.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f269cae39869a950ea4db43911f910ce/45451938062.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/zegaj.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/gdr7ji6u4gtuk2psuau0a4s6u5/10842751267.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/45019145954.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/tnm1cu07ib7ec9hk70rh3ohtpa/16641707813.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/68408795845.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/82147149207.pdfIn PDF document text
    • http://btfa.tw/upload/files/fivujupimobedipotiloj.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/88406571889.pdfIn PDF document text
    • http://fedime.org/imagenes/58356297338.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/domurotafamefukiza.pdfIn PDF document text
    • http://wphs67.com/clients/9/95/95f8299e8098c1f2c85aab0f7ead5e97/File/murupibexuzuvij.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/miribepafobidoruluvetenir.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a1bf8e4e1---pudonenodanasalabuk.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lumukusobudumurarubabuda.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160948449d3b62---20309509082.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=trenching+and+shoring+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_off00013426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 18648 bytes
SHA-256: 41bbe255e7bde0ddb65d0ff943851f738818ae3faf23582d750cc28b3a375a51
font_01_sfnt_off000164ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AE 10780 bytes
SHA-256: d496fa2a32645c0a6725cd7d82e5bbd6aa173ab4ed48b9187a656fc044e0894e
font_02_sfnt_off00017d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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