Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d84f3ee07896dff…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 01:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c0d4ba7af1287cc1d007bea12658a12c SHA-1: 1c32d18201a4c247127dd93a8ff101a5a5a68082 SHA-256: 7d84f3ee07896dff2565a63c69ffbd5704bffc53c0cae77bd036040ea3708a12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm designed to obscure the final destination, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://vialivonica.eu/userfiles/files/ximesewevunoguxewonuruse.pdf In PDF document text
    • http://sheilahancock.net/blogfck/file/26728764605.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/rolinizavepuwuwem.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/tivazagu.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/zixaxewoduruditakofiwuto.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/25223280591.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/27555457339.pdfIn PDF document text
    • http://walosports.cl/userfiles/file/3774963421.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e335536e00---94643290200.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/tafuxuzodefezokituwiden.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/gasulegejatomaki.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/40511595448.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/3086969436.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/gulisuwafimizunu.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/56991712068.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/luwenijumole.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/78152060739.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b2691ef40---87700956733.pdfIn PDF document text
    • http://aa-nusd.jp/14559583900.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/72634889836.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/10515635230.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/94a806016256f9414832c6662a7bae8d.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/34565319812.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/98983491941.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=watch+brooklyn+nine+nine+season+7+for+freePDF 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_off0000ddf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 16852 bytes
SHA-256: e25e26ae125176a72132f35e8b0735155357fd3a1bfb7fdf63fa13643b75de6b
font_01_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C9 10820 bytes
SHA-256: 56f68a8fdebc8198b5444e9a733ba96d8ac04e9a68437ba4d9bd49b9697d81bf

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