Malicious PDF — malware analysis report

Static analysis result for SHA-256 49acb030ade1abf2…

MALICIOUS

PDF

79.3 KB Created: 2021-09-22 11:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be5075b72b4af6727313d74da4147b93 SHA-1: e4016a70c0ef67d715572a0153ae79e1bb0d433b SHA-256: 49acb030ade1abf2748ecb599d5a1b4de848684aa07dd6da062a537843efc795
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains, indicating a link farm designed to distribute malicious content or phish users. While no scripts were directly extracted, the nature of the embedded URLs and the heuristic firings suggest an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://cambodiadriverservice.com/userfiles/file/tatovepelefa.pdf In PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f16a16a3f---75833115450.pdfIn PDF document text
    • http://allineers.netlovestories.com/upload/files/57090731211.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/tevaligusaxixurilupadat.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/sibepawezezalular.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/45364149942.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/87727375260.pdfIn PDF document text
    • http://bresky.cz/res/file/motojexizapufesekulup.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/32423114962.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/97358948813.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/muzutovawetosovusoruwuza.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/kebajotupikujikuwiwilaj.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca93801a36---duluzewifadixobafalixaw.pdfIn PDF document text
    • http://hotechike.com/files/files/jewanoteremifejuz.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/99953669800.pdfIn PDF document text
    • http://keramann.ru/uploads/files/gojegevizuposi.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/86976312318.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210919104325.pdfIn PDF document text
    • http://msiutilities.biz/documents/tubipufuroforeragoxilup.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210906092126.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/32713329150.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/89754397008.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/50561935239.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/63096954052.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/bowovajiz.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/bivejokajelomakozemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+i+turn+off+nfc+on+my+androidPDF 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_off0000d2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E2 17172 bytes
SHA-256: 246669c205805ca2fdf515827d4cd383da491fcda98b059bbacd6c0bbffc3e2d
font_01_sfnt_off0000ff75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 10584 bytes
SHA-256: bc135f904ddfe48e80b1fa6458eed6d0bc50c45fc46fd204ed192ecfa0f297ef
font_02_sfnt_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1