Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0c64ec1418bbfa…

MALICIOUS

PDF

67.0 KB Created: 2021-09-14 12:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c8141cf194649a122cfe68215f658501 SHA-1: 16926c7599a2286bce7e1aedd84285b10b6874ee SHA-256: 2e0c64ec1418bbfa8eb99a7bf6738e75f38dbad5acb08f001a247837c98a6e56
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-only appearance, and embedded clickable action. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://chp-travel.ir/data/file/42771237214.pdf In PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/777961334.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/nosiverumotadu.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/51778809640.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/18931078584.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2f40deb3f---molinafebowuroj.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/xasesulasowawu.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/fa9d241f077ad97c2c9bd35566780f5d/kivirovesimanurubasemebu.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/60245117061.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/88057769238.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/61352205766.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/39644525624.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/dotipemeno.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/zuxumirok.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/09/202109061624202946.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rosobabojizusoki.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/99630033879.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/8172610995.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/fosadijofujebunut.pdfIn PDF document text
    • https://beautydent.hu/editor_up/43347660787.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/filikomati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+orfox+for+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_off0000ac9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9F 10136 bytes
SHA-256: c325e505518d1266d34915dce47bbf23dd45561b821b3c5ada3fd3d5bb2577c3
font_01_sfnt_off0000c35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35D 14188 bytes
SHA-256: 3fdb4e7c9a4696686fec88605809ad938776734717cd697951be3c34cd1279ed
font_02_sfnt_off0000e6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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