Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f30343c106d6d7d…

MALICIOUS

PDF

119.3 KB Created: 2021-10-09 01:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14901705464f0c7b650796273dfb7f3a SHA-1: c889aaf4bec9933f7548dd0b8f7aeb5f4fa373a4 SHA-256: 0f30343c106d6d7d2706fe39f357611539155edd09c544d9226a8fd4d080d439
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to potentially compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the nature of the links and the heuristic firings point towards an attack pattern involving directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=how+to+do+easter+egg+cold+war PDF link annotation
    • http://webmba.fr/client/logo/file/42486847480.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/katunaxizagevub.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/junilugak.pdfIn PDF document text
    • http://bbbo.handyfriendship.com/upload/files/74697839839.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/21330614689.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/mulujopewutakefoz.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/vomofe.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/winuwizitekiwak.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/85959917030.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614291040eb5b---runexugukedutebasuwanoxov.pdfIn PDF document text
    • http://zeci.nl/im/image/dimizedinusemonefo.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9ed509785---vovumumosoze.pdfIn PDF document text
    • http://apismorava.eu/docs/zaniratu.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/zodiwepowilovofula.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/bebifori.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615278fe4f636---87389068313.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/5754543279.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/fokelabogepovutox.pdfIn PDF document text
    • http://chirineli.com/img/lib/file/27729363612.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/sedulil.pdfIn PDF document text
    • http://th-hl.com///upload/files/58285544559.pdfIn PDF document text
    • https://eniedu.com/data/file/20210926235621.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0d321aacb---webolulakisovafek.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/87896508691.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/4278042442.pdfIn PDF document text
    • https://simorgh.it/uploads/file/48314293607.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_off000167c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FDF 10428 bytes
SHA-256: fac94179a0ae0dfef87d61731d9981ad6a6094bc798ddb54dbe779090549b5a2
font_02_sfnt_off0001977a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1977A 21376 bytes
SHA-256: 0413780576b3bad86cbb23827ac63ef968c6fcf7e6b683711b3a8f713aaf2fb4

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