Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adebace030760d9…

MALICIOUS

PDF

87.0 KB Created: 2021-09-20 11:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73b67eb79225b66ef5943e0cc149d5bb SHA-1: 1a3f302c37f025187c8bf7096884d1c0b16ceeda SHA-256: 9adebace030760d97237e917f6d977560d59b700a217cb7c26337a51ab351824
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external PDFs hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content. The presence of a download button lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://xetaihyundai.net/upload/files/lobelipawofekisuveluraxu.pdf In PDF document text
    • http://ctm.it/userfiles/file/97867420821.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/larejarajelizetug.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0cfm1859elrqhog11abi43peh1/nazavipon.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/pifolavogaxanoja.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210920090056216586eiss2.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/jabaxozut.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161340a47428b3---79818700523.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/71642040181.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/91898142620.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142940569c3e---nijewijogegere.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443f816b98a---73456978580.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/lduhff7mdmp5ko2o1eljbhctfc/39281719135.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/77516907316.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/sozamifagova.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/xakero.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/xasunolubixulululowodawa.pdfIn PDF document text
    • http://makrostal.pl/user_images/file/dufekum.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/24043489913.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/vexumezabiwavawinup.pdfIn PDF document text
    • http://abpaluso.com/upload/file/tekejenaworobi.pdfIn PDF document text
    • http://355353.ru/userfiles/file/gufodovasololibufo.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147f5d50b3b8---57878552593.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/genorapewaj.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613faf0b3aff5---62794275573.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161359033c02bd---rezelepi.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161323d2dc64d6---buzopebilapamovudujibibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=radhe+full+movie+watch+online+filmywapPDF 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_off0000ed19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED19 11028 bytes
SHA-256: e9a31dc786256253968d19acd3ae48fbd30ed9356a0e9304f0836a4dc60cd776
font_01_sfnt_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 18240 bytes
SHA-256: 25e98c0fdffc2a8d282fee705a90fdd9d713fb687703a7ad972c6c763d42df35
font_02_sfnt_off000135e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1