Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d4f86fdd557092…

MALICIOUS

PDF

68.8 KB Created: 2021-09-12 00:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 50810881649c108f154ec7b101246956 SHA-1: 5a2980522d7c525e25685ce803c31191d23fc7d5 SHA-256: 78d4f86fdd55709266b571e55a24bfa5ffb4a4e478fa578c6976e16e600fa353
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 sample also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tizianaiberti.it/userfiles/files/36015117893.pdf In PDF document text
    • https://smg.bid/ckfinder_userfiles/files/badusupojuvedafe.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/78789756219.pdfIn PDF document text
    • http://artdental.hu/editor_up/fimeka.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/61806742347.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/80564331219.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/72895133625.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/toxopivilefares.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/liwafavotubulada.pdfIn PDF document text
    • http://artio.pl/files/files/pukajoxa.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/midesefezemusanaxibuxilad.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/vuvapemodepaluzo.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/6497163678.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/92921342791.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210907003821.pdfIn PDF document text
    • http://chenruichem.com/upload/files/14400631487.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/12784733363.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/xalavumedivoruzew.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/mikonomijikibuj.pdfIn PDF document text
    • http://travellerisland.com/files/16058147425.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/6591021352.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/81630320156.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210910210245.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/niduxorinalukofonefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=www+android+games+room+comPDF 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_off0000b164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97B 10648 bytes
SHA-256: e0dceb616b21e3ec093c3d21a7d60420c0d99c20ece234661b2846f92726bc50
font_02_sfnt_off0000e1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 14424 bytes
SHA-256: 02d6070ca5731bb196de56c1a21dc18396d17fd6ddb3e5e2a66adff2c006cd4b

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