Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d3d8ae5df5c2b7…

MALICIOUS

PDF

68.8 KB Created: 2021-10-01 15:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 73f552f271486d03e3b3144d3a099bec SHA-1: 0a1a6293ee55dccbe314148b9de8bcb6dc6caef1 SHA-256: 59d3d8ae5df5c2b7aedd0a82cf3f8a8650835ef1d02639a7005e46ad9e8e1537
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=hunger+games+2+read+online PDF link annotation
    • http://hstechno.com/userData/ebizro_board/file/ronulunanu.pdfIn PDF document text
    • http://scantech3d.com/files/rerugoneteradogof.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/84229530818.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vafamivufovuxo.pdfIn PDF document text
    • https://huuphongplastic.vn/uploads/images/files/36937524626.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-9/file/biruguduxa.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/49306671483.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109251030391574.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/naritexubir.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/moxolatiri.pdfIn PDF document text
    • https://rakbah.healthybitespk.com/alpha/ckfinder/userfiles/files/26041012927.pdfIn PDF document text
    • http://kdekdyjak.cz/data/xufufan.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/65406448485.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/lisozaralodogitujuw.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/muwotuse.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/zegoxikobuton.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/gifepulet.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/48307104054.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/pelebazezapude.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34601963516.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/22049987629.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/98583887602.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/vefup.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/93284893210.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/55138667314.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/43193754489.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/48905640857.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_off0000b04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC861 14688 bytes
SHA-256: 2338e3992b977a4783f72eafb92a4496b4e064668d5f9f02f8c7f1c9378fbf03
font_02_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10704 bytes
SHA-256: eaea1fe5d5b6d8e5e2835996b41a8c99843f10da9b17590ad9aa4d163ee56a3c