Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5193a37b55e23fb…

MALICIOUS

PDF

84.7 KB Created: 2021-09-20 00:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fba7e443082ebcf5cc20406d2e3d765a SHA-1: 74117fc8c989d57db8ee45b9ace9353c515abea4 SHA-256: e5193a37b55e23fb56fbbb61d478f9f06f14cc75df01d7f9e5bbc9da514f766e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several unknown URLs were extracted, suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mamotato.ro/userfiles/file/vosixaja.pdf In PDF document text
    • http://relindalouisylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34514948931.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/74479251164.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/tasupedel.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/29832708244.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/fisazifalonebidor.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/puredalejupixagutekog.pdfIn PDF document text
    • http://rentaruedas.com/files/others/lokagenuboronepexojiwepol.pdfIn PDF document text
    • http://3sdent.com/upload/files/99215765875.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee8b340c44---41950924691.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/35538473762.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/94685642668.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/moxipowodo.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/razatemo.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/dorukipivulolo.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/92097221403.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/82969209641.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/27010576788.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/gosisinudafobafodor.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/41436180791.pdfIn PDF document text
    • http://africareview.in/userfiles/file/95769471451.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/dozuwirabopuwumopunov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=messenger+text+chat+video+callPDF 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_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 10812 bytes
SHA-256: 126a4a1f711077b2a7db0ba857a714656f7e11ba35884a9298962a772e156576
font_01_sfnt_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 17540 bytes
SHA-256: 9bc8cd033c2bf912569bc20fd6cb386f549d1e22021e6fd1324270ef212178a0

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