Malicious PDF — malware analysis report

Static analysis result for SHA-256 333f02cf0d9cd472…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 09:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e66ca83a025f801fbf8611eb4262cecd SHA-1: 3f26fe25bb10d2f68e1a5aec20f392bbee4d9b28 SHA-256: 333f02cf0d9cd472814317b1f615a1ec4a669d308130a2e731527e71ebae0a33
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://inwebjor.ru/uplcv?utm_term=how+to+find+wifi+password+on+android+without+root PDF link annotation
    • https://fundacjanadzieja.com/images/wyswig_images/file/91883108955.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/wiroxepibifetebafere.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/xexegi.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/lakesunusew.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/pilebupefaloxo.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/92228190824.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/61895132207.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/luau7cs9p7saimi3il9d2beup2/xukaturugoxibapenan.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/91794418695.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/kupiro.pdfIn PDF document text
    • http://cdjuchuan.com/upload/files/zebimaril.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/fobapuzorisinu.pdfIn PDF document text
    • http://jiji.pgo.tw/pic/uploads/files/3071997778.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/wujeferuziruzo.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/fobaroluzojatipibevomus.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1613acbd93d926---kilemafit.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/lugozujijumek.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/rowixaxaxeduvugul.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/56091969036.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210913_5822F4FCDD34686F.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/vupenepafamaw.pdfIn PDF document text
    • https://clove7.com/userfiles/file/tozaxapesigo.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/jepobipisefafajizuwigom.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/xovaza.pdfIn PDF document text
    • 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_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 10596 bytes
SHA-256: 3683a3e1d440c3ba75bbbf55ad09533dc0a6557c905da8be2d2293844befcd94
font_01_sfnt_off0000f1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 18832 bytes
SHA-256: bd02a8d987a0086213bb8b6e0191e48bae16f7cd617cda9efd39f313c501ca0a
font_02_sfnt_off000120e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1