Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a99d72cb9c69463…

MALICIOUS

PDF

68.9 KB Created: 2021-09-18 01:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a352480c2c6b7f4a296a4bab5701f1ce SHA-1: 822ddcfc6cf1455f0c471ee6b8045a199c841b1f SHA-256: 7a99d72cb9c694635d91f79b95e7073c630ba86b70d492501db55d6777bd0c03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect users to malicious sites. The document's structure and small size, combined with the presence of a click-outward action, strongly indicate a phishing campaign designed to trick users into visiting compromised or attacker-controlled domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://garglob.ru/uplcv?utm_term=coc+gems+generator+without+any+verification PDF link annotation
    • http://tzsunup.com/upload/fasazomibabifa.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/jenegilopudiluw.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/87425848020.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c38df03df---tuzumebaje.pdfIn PDF document text
    • http://klhl.com/userfiles/file/memasowufefazameran.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/92954299811.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/31037770716.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/pelazurivedisa.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/lelepevejivitenizibu.pdfIn PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/65883057158.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/98540962416.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1614052a0c6f36---netof.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/483101928961631712135.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/fikufudetimizuxabag.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109121046268050.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/18470465847.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/76240665966.pdfIn PDF document text
    • http://recviem.ru/img/upload/53105136334.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/zujopizikefuda.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/92107160926.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/72678101583.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/gaxidogelosugevumifo.pdfIn PDF document text
    • 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_off0000b156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB156 13916 bytes
SHA-256: ee6c9acc1e4ca450346c5c7f06919bad3c515014e35eff27701e507434d459e5
font_01_sfnt_off0000d399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 11136 bytes
SHA-256: 0a460c9770c822c22d6a1adb47c317e73219b770c25939b34038adbac267f393