Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0313d7c69ffcb5…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 01:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a080892afff17cd86276d7ba142eea19 SHA-1: 4bf86b39eb7136b19e80eea611f60a396bf9efbf SHA-256: ae0313d7c69ffcb528d9e5ce5b31ce1f40b2f2af998ed4e20c933c7daa8a5e06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=download+esv+bible+for+android PDF link annotation
    • https://macroedunet.com/userfiles/file/tolobadavajosuziw.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/19230162946.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/542c5ed9a3fe5ba86cf577d99e4b4c12/61044283479.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131310fa5034---24151584522.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2a5127ea3---77223416218.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131221023cab---fagunewovuta.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/rejigojegadofowewopevat.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/58088122315.pdfIn PDF document text
    • http://lachina.cn/upload/file/xujuporogepegusubu.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/91363354190.pdfIn PDF document text
    • https://birudongker.com/contents/files/81929130655.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/4304719876.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/7620815290.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/zelevamimofida.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/bepewugijabunevezow.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f91b962866---zajojop.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/sixivinog.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/zawakafeguromumo.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/godirisabofagoxem.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/10326292075.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/xiladonosaba.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/sipowazilazonuzijivokud.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/pepepotogam.pdfIn PDF document text
    • 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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 17776 bytes
SHA-256: b66b13ffb25912a27b779ec4748fd18f28412b8fd063dc029e6e5d32f35eb087
font_01_sfnt_off00010c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C78 10544 bytes
SHA-256: 488e25e7a446be6ec3c269b747a3f7b5cd5e0cbddb58c2d2bfcfae395fd4899e
font_02_sfnt_off000124a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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