Malicious PDF — malware analysis report

Static analysis result for SHA-256 4446d3eb7ae882ce…

MALICIOUS

PDF

77.6 KB Created: 2021-09-09 11:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 725737b5ca307f74e9d35e6d4c9f1b82 SHA-1: 6d0c6e8dd46c8a9dc8dc29c2017ad6d7a68346cc SHA-256: 4446d3eb7ae882ce152e166bee1cb2202a1756ac5f701dd3890d381d764e8b96
126 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with heuristics identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The document body was unreadable, but the presence of many external links points towards luring users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://oniceh.ru/uplcv?utm_term=types+of+dosa+recipe PDF link annotation
    • http://alocainghien.com/uploads/userfiles/file/pumowiwevole.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/kidaxofibarixemuvesuj.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/funafekinefa.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/xelabumurinitoxosixexubix.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/13945482769.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/fugipafuwi.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/pilupagamifi.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/26156595553.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109011117508238.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/17631101440.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/50875845627.pdfIn PDF document text
    • http://wajl.net/img/file/2021981718.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/dituzon.pdfIn PDF document text
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/nupabununegapenow.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/41082643430.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/maluxuziguzokopa.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/93883162378.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/xetud.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/jofub.pdfIn PDF document text
    • http://web5gstore.com/Files/files/wapukoralidatizijojiraz.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133d09016775---36707516694.pdfIn PDF document text
    • http://cosyromania.com/media/file/niwifajuximodotatepi.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_off0000c97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97C 10444 bytes
SHA-256: 66aa2c5189c759e07231b159f01c005d5d404eb332c6064c9c6a2f30d6d3fc75
font_01_sfnt_off0000e14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14E 18556 bytes
SHA-256: cba71360b02e1ce61c4799b63b256214b38eced8fe16bb402c3ef2c3cceb0629
font_02_sfnt_off0001113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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