Malicious PDF — malware analysis report

Static analysis result for SHA-256 38feaad4d0f7e35b…

MALICIOUS

PDF

75.3 KB Created: 2021-09-09 03:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7a9f612c0b9ff017b6ca78a3c8275dc9 SHA-1: c9ab4d3b298876a32dda0d889b92735790bc2c5c SHA-256: 38feaad4d0f7e35bb04731b389283f6d271ac5e0f8facb65f6f1c33daf0ebb60
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a large number of external links on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://xn--h1aeekk.xn--p1ai/files/file/zaxadupofonixegifiger.pdf In PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/dotopadilosezemududewib.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/29085607526.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/jovoxopexirojenuk.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/duluguvizixozidukadorobiw.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/ganaruralexejamuf.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/44161837326.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/wuxuniwedukitonoxej.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/boduzilejekalofewotulak.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/22408115817.pdfIn PDF document text
    • http://aimic.com/userfiles/file/parafijepavar.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/xikuvuvimefaluf.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/01d4d1fd6c165fe0bb066a9331aee998/25596179804.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/36234007764.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/14508055768.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/0neqqaqo8rh8uhgheg0fp5jpf4/mofolix.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/devinenufimedebi.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/98256988579.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/93665560753.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/memokivomuvabojiju.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/93750074636.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/zomotowobigididawa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=command+and+conquer+red+alert+2+apkPDF 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_off0000bbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCC 10904 bytes
SHA-256: 3b563437b161c573b658fdb1b9e71df0111f5e3223cea9dee6ae6f7ee139df71
font_01_sfnt_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 18880 bytes
SHA-256: 3390fc1e13ebe12e1a9c92f33daf22efbb1979378fa8b5c92300160b055b9e40
font_02_sfnt_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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