Malicious PDF — malware analysis report

Static analysis result for SHA-256 249db8b2783dc608…

MALICIOUS

PDF

73.2 KB Created: 2021-09-12 18:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3efd0afef8050feba90ea4b0fce144a SHA-1: dddef224d4f62e30eaec681f5de4d96f36efc855 SHA-256: 249db8b2783dc6082dec43e0e0787781b9d80b973798e8ee3106de0928a9815c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it is designed to lead the user to malicious content, potentially for phishing or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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.santabriganti.org/admin/ckfinder/userfiles/files/64262551617.pdf In PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/zirexuxikomuxudokovapip.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6c128be2f---10514199318.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/72437805467.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/22404289327.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/98597237458.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/xuzavitevekigitexi.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/fisojojegebisasi.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/xiputisexetanunora.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-3/20210903070528808474.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/mutipepekerukemu.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/vajulafiwibud.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/nigaxuwazodepe.pdfIn PDF document text
    • http://okna-kursk.ru/page_edit/_samples/userfiles/files/46101322257.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/4432869679.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/kefepolururupetisebiraluv.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d9551edc3---mazudobew.pdfIn PDF document text
    • https://sayurhijau.com/contents/files/lilixipasukatogir.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/86045084073.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/59329146789.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/23635854836.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210912173414332712f6zk8x.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/28210171699.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/fowijeben.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=instagram+online+post+viewerPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/dejiguwamevugigok.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_off0000bc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 10696 bytes
SHA-256: a8175000df72582c5bc11e5870d8adaaaccadd9717cce95e3880acb568067583
font_02_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 16356 bytes
SHA-256: 76c3acbf4a1b842a0b2a91819b5f3c7235e13b9b9549dca33c20de15a52d46c6