Malicious PDF — malware analysis report

Static analysis result for SHA-256 043f09bdcd805d24…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 21:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f88c09a971033ab286530bb39a20bc13 SHA-1: 4baa35aa6425c417789404d2068a06d6a01b772d SHA-256: 043f09bdcd805d24e2f8042feec88300eb1313fa958e40e376080a8364c62623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm, directing users to multiple URLs hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce478330b---gagiponodudima.pdf In PDF document text
    • https://genia-groupe.fr/images/files/vepojamufekiwezokij.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/52422728768.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/guwarasofuwali.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/11144641609.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/tipafakuzodofifeduw.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/96068462370.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/250202340b24c6434c48ebbe13abf90d/36882929442.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/86021992768.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/90667215803.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/5b1pg607f6qkp9tdl7032c6jau/sifugofibim.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928756dab4f---67110444582.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/gimojonosa.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/fegavapikofamevol.pdfIn PDF document text
    • https://iword.de/userfiles/file/wokexibizalituvuli.pdfIn PDF document text
    • https://lamthong-marchph.com/piceditor/file/99146602426.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/52242483166.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///42337316644.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202152964390574.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/wolesetikubanafetepefiguw.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///jakaxazirarowewup.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/dugunesuwefesekifuxikore.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/kudire.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/vaxilujapepesuxonato.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/jupivugezisexowumipij.pdfIn PDF document text
    • http://master-vin.ru/files/file/46360843113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=agentes+antimicrobianos+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_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 18156 bytes
SHA-256: c145edad4f37022c869948f877e10bce4b2a22969590b3c22cbe111ff45e54f6
font_01_sfnt_off00010cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 11040 bytes
SHA-256: f5f700c9f49566dbdee672bbf1642f41993b0e9bc11a3a08a7c7ec35b83afaf8
font_02_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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