Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa23cb7836f531c…

MALICIOUS

PDF

77.1 KB Created: 2021-06-25 17:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0e4bdc12ddb776a8ecab1238ca80108b SHA-1: a695a480cad1b4bfd1c87e9e84cfca3b8bef55dd SHA-256: 1aa23cb7836f531c356b0bd58852aee61a0daae90656dfd688c10f9bf8f7e271
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of 'cmd' in a URL path suggests potential command execution or exploitation attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://infrive.ru/uplcv?utm_term=mercy+chinwo+jesus+you+love+me+too+much PDF link annotation
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/03d9c92f3f807bdc140d9a425f965d88/venepajobubonexi.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/06/19/mipovikuwugomerivusekoli.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/a1240fbfd5b1fe291ed502042e27ca42/89644887016.pdfIn PDF document text
    • https://vestol.bg/files/file/xumukixanimisujaloradura.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/9cmdrjphub3n2oeb0cfch767fc/rorokonapiselasagez.pdfIn PDF document text
    • http://bakoca.hu/files/file/durununokesubebumib.pdfIn PDF document text
    • https://flyags.com/editorResources/file///89452090322.pdfIn macro / runtime command snippet
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/4s8tj0nekp5l3ssp98b6ou6cs5/diluji.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080b93c57d11---malukogisejakavofeg.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/sesomi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/897cf6fadde2d65992d48e6af6e3ca53/57625013822.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/kq3tl2vao33upa3057mtci9reu/dinobubijiwuresigat.pdfIn PDF document text
    • https://aedwea.com/upload/foto/ralidividowebanadofalug.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210601091110.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/95792893758.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/1ailgvb842ta4qpmst753usrft/polisuzowe.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_off0000c7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 17188 bytes
SHA-256: e1d502ad335922e7962fe86798d928ea9df460314680721feb48351ab5f529f5
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D18 10820 bytes
SHA-256: 6d90e02ab695a8caf442b9463bbb6ecfbe2d20a6f6ce72e5f3809d58dedf4993

Open this report in the interactive analyzer, or submit your own file for analysis.