Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebb7c01f1006f3b…

MALICIOUS

PDF

83.3 KB Created: 2021-09-12 00:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9fdf29fc1cb06c823d6b4de51c76f418 SHA-1: 4a4451c004cc483aa8d7accf314c94373427b94e SHA-256: aebb7c01f1006f3b58046446e362e2dbc7cfbb08e2a996f93257f3f8d28b04f5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions and a password to decrypt a malicious archive, a common tactic to evade gateway security. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drafthe.ru/uplcv?utm_term=wwe+2020+ppsspp+download PDF link annotation
    • https://nedimgame.net/calisma2/files/uploads/25870732776.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109082051104269.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/virob.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/wolifawupov.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/98463134842.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/389249214bd4595d77aa8a643666b164/puwulamojaduvukevajif.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/61250922263.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/weduzusunimokalirivoruzaw.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/ragusepexezulufix.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/fularu.pdfIn PDF document text
    • http://dobermanncz.eu/files/zijebezizedoponafiramol.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161377b623c891---pamojagebegoligawedebos.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/dupurasojitotagovoduseda.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/48955134225.pdfIn PDF document text
    • http://irollee.com/userfiles/file/fumevafunaxumut.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109032147267882.pdfIn PDF document text
    • http://vodova51-53.cz/files/59425635630.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/18450957921.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/33611528540.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16130d9f16568e---nabefototupawalotovolokut.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/menimupomopijenowaroza.pdfIn PDF document text
    • http://psychologadamczak.pl/userfiles/file/delagipoxamus.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ikcvgg0iu4tsd2oqu9tpkh7qea/gixogikanere.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/13790163828.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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 10416 bytes
SHA-256: 3d15a73ab310fd2928a73e16195814d40c77dbc07267ce40757ee3535e0eac0d
font_01_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 17376 bytes
SHA-256: c02313fbf4b6978c6ba0934554de487e18e2bb9947a27bf43d6b8586834ebe56
font_02_sfnt_off0001274a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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