Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed087bed9ed715d…

MALICIOUS

PDF

93.5 KB Created: 2021-09-07 14:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 877997b7a0b394e25eea236a3d817831 SHA-1: 1696fb85345ecb6086b0fc58ea74c96994903758 SHA-256: 6ed087bed9ed715dc3a5b44ec92b5d555da3e20932c8cc6c65350bcd244f7246
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress uploads, suggesting an attempt to redirect users to malicious content or further downloads. The presence of a link farm on disposable hosting is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://villatoscana-pi.it/userfiles/file/59231846460.pdf In PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f061ddedd0---8060824209.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210508175216.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/kemar.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/korunaketemas.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/21928146184.pdfPDF link annotation
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/qdhf1c468djtuge64gp0000u62/filofidotapizazunale.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/76126258531.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/3400rgfd9ggm2m1me7eajau09d/digazivepesogeve.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3bf75da1e---nolevokatibipodigefapiki.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210829062520.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d61e7c020de8bbd6df4a8b8bc8d83f9f/60431371801.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/49423642532.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5c3cb6531---nixadudasozukinasob.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6d1d5c8c62f2a0cbeed37a6085a043cf/60823703650.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/38b662c3f1709ba1b48d16d3326a725b/lemubapejotul.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/15192564851.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e550ed29785---gibokakawubigeb.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3ea41df159cc128638d9d6bf99bce377/48358565868.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/50635225060.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/98078044502.pdfIn PDF document text
    • http://fygl.net/uploads/file/030955561799.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/pijak.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/lr8dq2maddn2tojm356h5dst7q/komogubokalefedekaseloj.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/40083583029.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/dawerudewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=drugs+avoided+in+g6pd+deficiency+pdfPDF link annotation
    • 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_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 11100 bytes
SHA-256: c5b00a040243ff9624f3dc7f501670b9763ae861baab6a08705be4388289a18f
font_01_sfnt_off00011ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED7 18892 bytes
SHA-256: 39edef3e15eb04b249293ef90e271d4cea95993f7cce60aea056b1c28d13bae1
font_02_sfnt_off00014fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1