Malicious PDF — malware analysis report

Static analysis result for SHA-256 baae29641cec79ac…

MALICIOUS

PDF

77.6 KB Created: 2021-09-09 14:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e66c9062bfece6fbc2009ab1b3b78dae SHA-1: ea6c1d8edae7b1efb204883c96046fb473afbf49 SHA-256: baae29641cec79ac1907ecb2fa8337879ab60957ab2ae598e4c51afecb49067d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 numerous external URIs, suggesting a phishing or spam campaign. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://irish-setter-zucht.info/ckfinder/userfiles/files/72804910661.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133763dca7d4---32556165082.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/topiwelajanun.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/dekavuxaxebigilijodev.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/zokodunuguzobirum.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/lujarevedugamaradap.pdfIn PDF document text
    • https://spyboarcams.com/files/fiwanupilevedunevibefus.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/sovuxejuvokimitur.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/49688382236.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131587685709---xarukatuzatosogofag.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/pagabipemiloruvafexudeg.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/44242541834.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/fosexatawidetavovifumesas.pdfIn PDF document text
    • https://onlinendttraining.net/files/860322120.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/37750385065.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/17842380954.pdfIn PDF document text
    • https://sergeca.com.ve/ckfinder/userfiles/files/lolunuboketu.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/dugunemikamozasebiroredim.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1630882212.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/xizixowefufiri.pdfIn PDF document text
    • https://irantruck.ir/data/file/fopupe.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41021176321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=boka+bananor+smsPDF 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_off0000c5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CA 20056 bytes
SHA-256: 5bf88bac0ef283dc96794abab2aaa1cd38ed2842d0501e7aa7a3ed00cf7f08f4
font_01_sfnt_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11228 10184 bytes
SHA-256: 047d27f968ec238e5d5b763a24564f23b58ddc1579c9f313183057cbfa672e8d

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