Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbd14351df7d611…

MALICIOUS

PDF

70.9 KB Created: 2021-10-01 12:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d2f90fc92f50f471a577bcd931b6367d SHA-1: 45515edde5f24a3b8c74e8ec87c4f69fd3a1b5d9 SHA-256: 2cbd14351df7d611520781627b832e864f74307aa36d627d9645cf679d08810d
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a URI pointing to a raw IP address, indicating an attempt to execute malicious code or redirect the user to a compromised site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple links on disposable hosting further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://sibaco.ru/ckfinder/userfiles/files/24495100874.pdf In PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/lunodenadilajud.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/pivodulidalakukuzuxisofi.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/75155474163.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613092410d904---88078307832.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/2782731177.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/95911864487.pdfPDF link annotation
    • http://garage-ys.info/js/upload/files/tinuxopapejumugok.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/28845178939.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/74868393800.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/60835422117.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31624729898.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/gukiwogobopib.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/xatib.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/28381305346.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/93129101076.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210908171353_1039240197.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/puxetusepiguputige.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/21486775386.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/f533c7166d3a68cb761afbf911a799e6/58180422972.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/wekezuwomat.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/655051693.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/zixawuxunuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=download+fall+guys+android+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_off0000b3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C3 16148 bytes
SHA-256: 9ab8eabc7ffef28558948726f6f546b04516eab1baa22ffb5979f7fdb8eaac32
font_01_sfnt_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 10836 bytes
SHA-256: 3e16e298ed75dde3a7c70aa245ba4a195fff91213b4a959dfc7950ad496ba257