Malicious PDF — malware analysis report

Static analysis result for SHA-256 6774e0deaa121090…

MALICIOUS

PDF

131.7 KB Created: 2021-06-29 13:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa6154a4614f3d793f65b72504069711 SHA-1: 1ab4aa8edb68a299fee5ab078bfde37ac2f2f17b SHA-256: 6774e0deaa12109091309285344af6b972ab52d9aa78fcc6059c115afa5ca167
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or are part of link farms designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and numerous links suggest it's intended to direct users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

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://archism.ru/uplcv?utm_term=how+to+determine+rate+law+from+mechanism
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/e3dsst1ps3kfds6uv1movqjggk/kebidodod.pdf
    • https://clinicamanila.com/ckfinder/userfiles/files/dekituwatobinami.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d44bb1663e4---gujekivugavimamo.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/7b6ec92ce592bf4f398009047c148bf2/zotebivuwasivowesir.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080cc27d4ef6---65223391458.pdf
    • http://akkoryazilim.com/userfiles/file/tetemeronoga.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/gfccrhe7d7pld5e623dvaiiu9f/88879911543.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/ab849d0bb3ac30d7c6902829a999931d/vezurajifadedasuzi.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffbc523422---95772299019.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075e047497e1---44251496015.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/acc7e4e8f08d9d3bc8a7f75622c9329c/16604715268.pdf
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/8506124878.pdf
    • http://tcihk.com/userfiles/7309205319.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c3f866b2d---kewejasowo.pdf
    • http://liveisagenix.com/ckfinder/userfiles/files/43017187801.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d801ccd7d58---rirobotegumenifebatolumek.pdf
    • http://mobilenmr.com/files/files/69402347725.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/6262076c20a43a87ec17bd20aefe8735/12831594428.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f305b92cab041763c0c87d6494fdaef7/25676017120.pdf
    • https://eberli-medical-supply.ch/upload/file/6164786822.pdf
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/65451114461.pdf
    • http://hanleyresources.com/images/rupulul.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/3842ad73455c80fc6bd307f1aa0ccd15/45643272982.pdf
    • http://auapp.ch/userfiles/files/fubirozizujuduz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018632.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18632 16792 bytes
font_01_sfnt_off00019e44.bin
d7356c3707587beec5f72de08ec14f14120ac62a7db932d74a19b1113879b4e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x19E44 19672 bytes
font_02_sfnt_off0001d2b3.bin
ece170ffefa11cc5e13a326767604c0b81cd26d8ceb731f8c5ea91ce322f0835
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2B3 10820 bytes
font_03_sfnt_off0001eb71.bin
505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB71 16100 bytes