Malicious PDF — malware analysis report

Static analysis result for SHA-256 6048c5efbde5cdad…

MALICIOUS

PDF

84.8 KB Created: 2021-09-21 19:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f57fcc8ada6203441b367f1c78a1e0fa SHA-1: d2a70e94c431a6b1c36549cca9bf0490dca975aa SHA-256: 6048c5efbde5cdad14efdf265a8a2f2fd9c9f14dcfac12798d1bc6fdc69fe5c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. This suggests the document's primary purpose is to lure users into clicking links that likely lead to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ameshamagazine.com/js/upload/files/tefogibezotadutonite.pdf In PDF document text
    • https://daynexweb.com/upload/ckfinder/files/xepijusetazizidili.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/41146532283.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1613b938d1c2fe---42647720387.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/68983550448.pdfIn PDF document text
    • https://slide-bearing.com/d/files/5707528663.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/fedekopekubiwamedujasixo.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/siwovifilokolojutitugu.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60871472498.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/84639739767.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/76464772930.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfb6923c01---wugezirimoz.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/19459076080.pdfIn PDF document text
    • http://caratow.be/userfiles/file/69297235567.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/sobixavilabudorajuxew.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/36140929711.pdfIn PDF document text
    • http://tid.vn/upload/files/70729864330.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ed4369eb708ade4059a502bd78dd28e7/midowogu.pdfIn PDF document text
    • https://red-adlay.com/upload/files/35530570915.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/46453645312.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50329581984.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133be4aa0f48---samemepew.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/28515155876.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/11503734033.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/9992120032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+get+different+fonts+on+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_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 17056 bytes
SHA-256: cc44ab2d71eafef618307d3fa71dfa8b25da6272c4ead81985105cd95826bdf8
font_01_sfnt_off00011505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 10560 bytes
SHA-256: 248ec8204152e04ff56eab7b17fcbeb834e9d2be1e88880bbfa7e8b70ff4bddb

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