Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a14aef4c093d7d…

MALICIOUS

PDF

70.6 KB Created: 2021-10-06 05:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6422e74619c0b8c846918a2f61ffa2c7 SHA-1: a8ce76b21aa42a1c35aad64062b4eebbd6fc5a76 SHA-256: 72a14aef4c093d7dd8cff7d2a642cf9a4d5f6937d6ca7d8ab5eb8f5b1fd399b1
124 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. It contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or link-farming campaign. The PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8434

Heuristics 4

  • 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
  • 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://irlanc.ru/uplcv?utm_term=class+10+icse+chemistry+solutions PDF link annotation
    • http://hla.vn/upload/files/zekomov.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/22599075966.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/6263369470.pdfIn PDF document text
    • http://kccmaul.com/files/files/wamapowufotifegawopusar.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/41311416474.pdfIn PDF document text
    • http://agenturamotivace.cz/uploadfiles/file/89313556144.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/40639658623.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/15366777666.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/95966195646.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/52948797673.pdfIn PDF document text
    • http://ubest.ru/images/file/53598446501.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/mujela.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/berewiwezaxawetaxosetafok.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/1053294920613f9e3d583a3.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/90023788448.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/xaxavutatotonorodevap.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/49692c514b4ef281bc98653aa462fbf8/fejofarolisikatijoru.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/zuxavinisalajawafurabafi.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/xijafimirakelorisisarasa.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/xujisibisudit.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/xubenesigegupalirexoz.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/29463722808.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/wikadifomefami.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/jepaxemese.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/62297257926.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/lanumoladokumamak.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF56 18572 bytes
SHA-256: c379ca964b60343d4fa033812f50a61a69e10a27f0925ce5a398181ec38c87e1

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