Malicious PDF — malware analysis report

Static analysis result for SHA-256 962a7b9f02758013…

MALICIOUS

PDF

68.0 KB Created: 2021-09-28 04:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e219e8506fd0fe4aee61b90f971ff76c SHA-1: 486d85b45a183c67d73c7de96727da3f86b2afb3 SHA-256: 962a7b9f02758013ad1a07325cf4b9c4778993d3d5b2c9ffa4feab09d2240446
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, but the heuristics indicate a click-outward action is present, likely to launch one of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://bacsiha.com/public/ckfinder/userfiles/files/padako.pdf In PDF document text
    • http://trongtinpc.com/luutru/files/92841699586.pdfIn PDF document text
    • https://cargobull.cz/res/file/53211430520.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/newadusokewezis.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/10899798095.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/dekafojubufadisibenobulu.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/89010096746.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337667103ef---74428998236.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/1451519031f0d0949aaaff8a57f3d8d3/lejenagamuloraxizut.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8f6ac7e6f---rexisosi.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/pozixusefunamizo.pdfIn PDF document text
    • http://rld-carbon.ru/file/70076542284.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4081ed9e0df74d3c8092b5dc9c851275/sedidulowedibuzuwex.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/020lma1hm2mdhlctilc64ejvh9/57792766502.pdfIn PDF document text
    • https://khonggiansangtao.com/platformecom/img/upload/file/72508868697.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/45037320824.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/43340287742.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7b79c0d62---dagarokapipenax.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/sefusememijos.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/9f0db28f16d7cc25c155b6d699db8072/gumufojofajotaru.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/99732160535.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/zemumowuginesorerut.pdfIn PDF document text
    • http://hanleyresources.com/images/7122612826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=s8+phone+screen+sizePDF 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_off0000aea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA7 14492 bytes
SHA-256: 823434f94dfc1a6d3212155e5bc92ec185895a7fa92d2f144751a2357fb391cf
font_01_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 10508 bytes
SHA-256: b5a649b17408e9d04830c40226a3578f415db2d6bd07d18562c5d5b7b28a56a8
font_02_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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