Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a870fb9a6183ae…

MALICIOUS

PDF

95.1 KB Created: 2021-09-14 08:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8b8d12613aafe0583107eaae80174f4e SHA-1: 37781c7d93938002523c0c82dd2993d56ce65877 SHA-256: e8a870fb9a6183ae357a1467c64c7882bc0d08ca94b2f6e3ae516b771bf28105
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to suspicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are characteristic of malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://abwpetersburg.com/uploads/files/30109285409.pdf In PDF document text
    • http://zh-huaxun.com/uploadfiles/files/kuxifavepaxa.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/zejonededalaruvozoxedud.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/39457747906.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/mosevutetedapibop.pdfIn PDF document text
    • http://status.cz/UserFiles/File/busakirasipakag.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/44370893128.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/tosowunabigi.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/90584653769.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32591235496.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/23979144159.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jopibuwelaxezonamulugo.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/pegapevorupijakuzosu.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/kejamaguvopexomuku.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/93979970592.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/34074601969.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/vibivitex.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/80425483310.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/gifekewidalelo.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161315c1b29a88---setuwatuxijaxubi.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/xuwed.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/51417826311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=population+top+20+countriesPDF 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_off00010ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 18444 bytes
SHA-256: f60517d006feb85df663fa8b6ec60aefc5c690bba9b365548b831d4f72254c86
font_01_sfnt_off00013e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15626 10708 bytes
SHA-256: 2671e099493170a732473af331bf6692bf8f34e5dbcba8c0022c704e44583196

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