Malicious PDF — malware analysis report

Static analysis result for SHA-256 badc46f31fcc9b29…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 08:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 22da71822dec4c2c5eed398fe7a144c8 SHA-1: 89c1d6a33f0b1405c23ced341d240bd18d325c99 SHA-256: badc46f31fcc9b294ec82d7a8dd2985550f6a403564457bc389c02eb160a3633
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.binghan.my/userfiles/file/defupozig.pdf In PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161316a40a70a2---tovigafitegopasutevigasi.pdfIn PDF document text
    • http://mextro.de/upload/files/4172917092.pdfIn PDF document text
    • http://phuongsen.com/img-chamthi/files/ranubusoleg.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/53949553082.pdfIn PDF document text
    • http://maidichike.com/upload/files/90352079025.pdfIn PDF document text
    • http://generaldistco.com/images/file/46591668010.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/nujorid.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/74542075414.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/40314617464.pdfPDF link annotation
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161309b8297e34---mijitetazosejerexesotigig.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/tiwadufanilapusogatep.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/fujazavifunojezap.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/wotixexeter.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/kefewekatovezu.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/92152511559.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210907_B0A5157F385D462B.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/61730486323.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/todimojojebojiwedibosum.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/jusuzonejaganamodudamufoz.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/lolovasifepagusi.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/94136665871.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/zozorujuvagome.pdfIn PDF document text
    • https://go2germany.ru/files/file/55516650362.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/lidivoxisozufuwere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=spin+to+ff+diamond+mod+apk+unlimited+moneyPDF 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_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 10772 bytes
SHA-256: 00934f02f4f1753852fb9bacefeb8f55d174d28c963bd20d0de8a1024e1afe6d
font_02_sfnt_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 17368 bytes
SHA-256: f17f489bd37b4f72d78019edce93b967431f7be00909e5bed969934331ddabd8