Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e4f47989e6db17…

MALICIOUS

PDF

99.4 KB Created: 2021-09-12 19:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f0777986ea55cd6b276e05875e89968 SHA-1: a6739a9ffc14ef2e5a90b0d14db421f8674b1381 SHA-256: 90e4f47989e6db17640837870ab619540aeccf3f87de939fec5ee7fd35d4c41c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or content-luring campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://edusfera.pl/upload/file/jomaporolitomusif.pdf In PDF document text
    • http://tavio.su/files/file/58267024339.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/xujixiziso.pdfIn PDF document text
    • http://belovosushi.ru/files/gibetevafafujore.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/sagegomoruzobazuz.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/24870859833.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/tameletupapanazakaw.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/sixozexal.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gixalenajuguwumamisapi.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/memamegikuzixo.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/welamatolowoborut.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/3995294111.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/74080737425.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/59757752659.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210902030157.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/79867717351.pdfIn PDF document text
    • http://safetruck.gr/images/file/mexazabajifuvu.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/kotina.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/didiporodosemaredopuz.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/purosawigorivexep.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/lawuked.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/5079186578.pdfIn PDF document text
    • https://greenways.at/userfiles/file/36049880053.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/98222624343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=major+arcana+meanings+pdfPDF 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_off00011ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACE 19952 bytes
SHA-256: cf746ed8484bbf037ec024543ce552b688285127ff4604c09038e8df2cf36c92
font_01_sfnt_off00014e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000166a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166A1 10940 bytes
SHA-256: e64bf8fdcfb876fa6991945c04826b22c594993b3ddaf87eeaf2ddfe92d8fbfb

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