Malicious PDF — malware analysis report

Static analysis result for SHA-256 0900925f0f64bd99…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 01:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00116ed7fea29a5780a8683d1903a1f1 SHA-1: c6d06a157cd0b31272f50a7789a33953f27bce6a SHA-256: 0900925f0f64bd99ef335915ec0c160ff5c96615b33c812fdefdf890cbea9d3e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious sites. The heuristic 'PDF_IMAGE_LURE' suggests a common phishing tactic where a visual lure hides clickable elements. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 0 text block(s), carries a click-outward action, and is only 69 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://cructi.ru/uplcv?utm_term=gta+3+apk+download PDF link annotation
    • http://orvosvalaszto.hu/uploads/files/wofatunurisemogejo.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/nubibogotup.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/96933212565.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/63349021539.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210905051430.pdfIn PDF document text
    • http://enewind.com/pliki/file/benexeremedurutolenaja.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/73675260438.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/befarutasonefejemowuzig.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/peketudunisopo.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/muvumuzazividojaw.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/12072599375.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/95317730252.pdfIn PDF document text
    • http://phukientubepxinh.info/gomsu/sanpham/anh/files/62692476652.pdfIn PDF document text
    • http://esejsc.com/upload/files/12447559807.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/bipurobupexemidogukure.pdfIn PDF document text
    • https://bawauang.com/contents/files/bejodonarofalitujis.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/17410337992.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16149a7d89a9a6---figosa.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/fewizufakokekesazewameba.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/miwavuvexafezojajuget.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/92838132766.pdfIn PDF document text
    • http://indexone.ru/upload/file/fadasujikalejig.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/raxefejesenopukubipogi.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/58815308947.pdfIn PDF document text
    • http://assisdrive.pt/userfiles/file/48711876074.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_off0000b28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28A 14520 bytes
SHA-256: f9f3b341331dbde595df856a6ec68d5e397b95b029877f437e2fcd4bf72518ae
font_01_sfnt_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 10280 bytes
SHA-256: c2023469c07b7d34fcbef457d51763d964ad238e7c28fafa379f3574d6bd6f71
font_02_sfnt_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1