Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b127054957f24c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-12 18:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1c0d0d304faeb8564e8389d015f7a27e SHA-1: c621924346948bd9384a9563a4223da27eeac523 SHA-256: 03b127054957f24c8df5d01669a47a7a02b80bd6586efbd369c8f1dfb3f429c5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of a visual download button and numerous embedded links. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and embedded URLs point towards an attempt to trick the user into downloading a second-stage payload, likely disguised as a legitimate file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=download+private+browser+with+adblock PDF link annotation
    • http://umrllc.com/userfiles/files/vujonobamititenunarubivad.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/1970136246.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a30567e08a969b65c2dfb190efd0e893/gunebu.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/97861007348.pdfIn PDF document text
    • http://envigest.cz/upload/file/dibiwanomodofamupageriw.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109110508417917.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/65057520065.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210908232847.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/62325373553.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/pezozobiluxi.pdfIn PDF document text
    • http://tabletopad.com/images/file/guzenisofumamorulajuv.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/lamofuvepisibejotulew.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/50552526069.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d74b90f6---dikaraki.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/dofubovunewi.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/mikuvuwefeg.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d64676f9ab---luxolojomufupokebas.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/48668985182.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77814046736.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/limejoxowuposejifipixul.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/nojotifavam.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/dizipedak.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/34305214995.pdfIn PDF document text
    • http://edallyshop.com/upload/files/ludisegi.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/nafonomuxe.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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 20024 bytes
SHA-256: 8801acd9d07ff532fda3f3f09636f961a5705b361ddf6fdfae5b9c799483f661
font_01_sfnt_off000111ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A16 10996 bytes
SHA-256: befae9bae4b6fa0b46d4fbd94c8a51ab08f3d4ac324de4cd580558b35dfc4d57

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