Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd299038511c7cc…

MALICIOUS

PDF

79.2 KB Created: 2021-09-04 08:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 11e97a5717e288823ca666958cdce9a4 SHA-1: 99e77799d6f7dfe2f2c4c43e6862f5cec8012191 SHA-256: 2dd299038511c7cc0dc3aabf7c731b5b1f88ea84735c60f8c8156bec50d162d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • 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://salwex.hu/file/50560475698.pdf In PDF document text
    • https://baobihungphu.com/media/ftp/file/gadevafatoliguvazoxeko.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/tadepon.pdfIn PDF document text
    • http://ubest.ru/images/file/90409657613.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/lu1spcg1k3nc9mbh8u5lig6d3a/kupegilenulunavaxorudaga.pdfIn PDF document text
    • https://plasy.com/uploads/file/76284926380.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/89a3c1e11752d6d898222e5dd3046a7e/barulexamapuri.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/53013171474.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/65534745630.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/kaxovubiroveb.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/nimapu.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/jalitopejitareta.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/54604988119.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/fezupag.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202108290512233836.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9839e8cd5---bipoluxodosumonomapizimat.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8eeb4e3e---pipotivowonitefiwoleluwa.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/81998221756.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/41444169567.pdfIn PDF document text
    • http://barnesfamilyre-union.com/clients/52050/File/xelomavexujizizenu.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/sfn3df3neeqe5nknd6dom99m7p/rugadaruraja.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021060902033880.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/74558914846.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/a08e4f223a7713bd1d7ab936e1d615d2/sutiromelaresu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=glacier+bay+faucet+manualPDF 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_off0000d0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 10604 bytes
SHA-256: cf219c8dfdcfd405169047f66ac296509e0df01efc9f04bff457c15bcc474748
font_02_sfnt_off00010149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 17896 bytes
SHA-256: 479147ad03167f6d80e39a288d07eadab204e038421bc46f05746da968824dcb