Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ddebc8e6a2a2fb…

MALICIOUS

PDF

84.3 KB Created: 2021-09-16 04:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a09f6e8ee4578c64e2559fbf38bd3930 SHA-1: 007c3a2ff416a5159a07b5d5b96bb230752ea1f0 SHA-256: 07ddebc8e6a2a2fb24addcbaa13ec2d31c701a3e53bafa87cb34c46e9cfa5490
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with a critical detection of 'Pdf.Phishing.Trojan'. It contains embedded JavaScript, indicating an attempt to execute malicious code. The PDF also acts as a link farm, directing users to numerous external PDF files hosted on various domains, suggesting a phishing or credential harvesting attempt. The presence of embedded JavaScript and numerous external links strongly suggests an intent to deliver a malicious payload or redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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 http://splhardware.com/UploadFile/file/2021090918183873499.pdf In PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/15797e95aa12be7434a15197a8fc2ef8/gejuzexilileluvag.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/46245579400.pdfIn PDF document text
    • https://regenerateacademy.com/file/38664133764.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/11614386525.pdfIn PDF document text
    • http://knauto.com/upload/file///97873062233.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/jadanifixirejis.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/48492363096.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/siviboju.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/zolipanuvi.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/bubinevol.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/17305823915.pdfIn PDF document text
    • https://mcsfood.com/images/file/60556532140.pdfIn PDF document text
    • http://generoussecurity.com/uploads/32372941079.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/35894523459.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/3770473524.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/tutibujoxuwegiwejesa.pdfIn PDF document text
    • http://eventechsite.com/files/files/jinelopobodoz.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/93030250230.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/xogomorizesefadosiperum.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/68712316604.pdfIn PDF document text
    • http://robedecreateur.com/img/files/87101347310.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1297221627612f53824e5e5.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/98554063544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wheel+of+time+book+12+pdfPDF 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_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 10624 bytes
SHA-256: 501b2b03ed94137ccadfdacae41cbdf3739939cc5aea0ed4cd3513b16c920899
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001128f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128F 18920 bytes
SHA-256: 17c99074bdd82aa63190cd85490f062581844fdf7a245cde6e980ae0a934c734