Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0a00054e832935…

MALICIOUS

PDF

76.6 KB Created: 2021-09-06 04:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d13ba2492c88b493cbf9686244b6b59a SHA-1: 90378f5f32ed1a3573d44d107b1eab24056b36ea SHA-256: 1b0a00054e832935eb1fe3e3874a6da923da77cec990b45f2794b70d6ff66d3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a network of links for potentially deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://irlanc.ru/uplcv?utm_term=star+shape+preschool+worksheets PDF link annotation
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2270e6a177---22138331485.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a65364fb4110d55b9bea41288dbfa345/zotodofuxiribaxuxanopun.pdfIn PDF document text
    • https://chp-travel.ir/data/file/buvide.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a0f42b3c3---gifuxixibagonid.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/sujibasam.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/9c0ca031a6d1ae26dcaf3f09a338d4ce/tikimonevubefudimitawojiz.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/fipisitelasebifomumek.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161030e4607b1d---vuwofizinepuw.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/vededetamisugav.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/xemamolemuzikuvugogabari.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91b20dcdf7---nosizedaxoxunasile.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df80f918ee---29341840080.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/5c7292d34ed1256e8b9e4ff7719d1223/70184345185.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/48591545307.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/gmilmopv2cm9nn6840pt1eh6h4/94492614544.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/fa7fcb76b86c05fcf3390177c224b041/defunubatezike.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210501232618241024105.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/11001841391.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/bvkf7o0fc5q7lkb8i3r7mnv782/pixemivij.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/22541364292.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1622735387.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4a7f44b63---83061461767.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609102ea072c6---20521253554.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/16e4a41fbfe5e82b1b50ed025d7dadc8/lazexipogejoto.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/77310381024.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_off0000c56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56E 10528 bytes
SHA-256: 21f040267834714210a9057750d3bc85a3e680411721317f708e257659389d03
font_01_sfnt_off0000dd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9D 18084 bytes
SHA-256: de8889923ea186938142acc749735f0bb2cd10fd387ea5eee1451b365d1ddce7
font_02_sfnt_off00010cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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